Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cede77bc5d8ac5…

MALICIOUS

PDF

93.3 KB Created: 2021-05-22 00:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fd911c6ba49ef569099535e50a52b005 SHA-1: 842fb5018ca49e6a666d5731698906948297d728 SHA-256: 62cede77bc5d8ac553ea8b5fe5db74af7120078fd9f86b000fa110b8c56747e7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a lure for a game mod download, which redirects to a phishing URL. The PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics indicate a phishing attempt designed to attract users through search engine optimization. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to phish credentials or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/strik?utm_term=army+commando+secret+mission+shooting+games+mod+apk PDF link annotation
    • https://xoretewajojuso.weebly.com/uploads/1/3/4/4/134474148/1006279.pdfIn PDF document text
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/karizowal.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/4610700.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/fuvudafotisebexokel.pdfIn PDF document text
    • https://suwisabinupa.weebly.com/uploads/1/3/5/3/135351097/sakulojezoto_mopariradower_xabimesog_povamosixujola.pdfIn PDF document text
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/9208b7e8b7411.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/suwuzarimuxuse-kovomiketevut-wazarisegijo-tamuwor.pdfIn PDF document text
    • https://siganubamisibu.weebly.com/uploads/1/3/4/1/134108806/vuzulum.pdfIn PDF document text
    • https://redobalopubijav.weebly.com/uploads/1/3/1/3/131380120/e9b3b1624661.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5d66eb-29f6-448c-9c7c-d27a9bda9e79/what_is_a_proper_sentence_structure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa09614-d653-4069-9f2f-c78d0f6a2790/sedozobexat.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/kunaloloxedaxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f75f449-230a-42ad-b819-a130ae7a6bbb/como_orar_en_el_espiritu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdaedef7-078c-4a67-85fa-8e59e5c8bf0e/83837212478.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/dawagubesuzopepufit.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/team_names_for_stock_market_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/1581492620.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/causative_have_transformations.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/hp_ultraslim_docking_station_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811cc8b5-57b9-4c03-af62-498bc49079f6/19044886056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61ac52e-7547-4455-8f5d-aeb3f23ba44d/1678902208.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/how_to_get_rap_on_roblox_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/mivujazuwikimivi.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/grounding_techniques_for_anxiety_attacks.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 1800 bytes
SHA-256: e9e37c17ae0900697deb59a8a5e94601930e07ddaec624f3355017443da69a72
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 2960 bytes
SHA-256: 00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c
font_02_sfnt_off00010405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10405 5608 bytes
SHA-256: d787492a3d0e5adba952341a985d364ba4cb7fb33ca61f7bea099d51d9b8c420
font_03_sfnt_off000116fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FD 4400 bytes
SHA-256: af823fd8c42b36f9ef0698282856bf59e53ae3a8354e5f34d95b20890d98b4f7
font_04_sfnt_off000127f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F4 11168 bytes
SHA-256: 01843f2a4643e3d53155f9e0abcb5b941e406c0f91a5957c19982e55f25f52fd
font_05_sfnt_off00014e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E54 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189