Malicious PDF — malware analysis report

Static analysis result for SHA-256 63707544d79f86d5…

MALICIOUS

PDF

89.2 KB Created: 2021-02-25 17:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 70ed303ac826e574b9fa23d7de24f4e6 SHA-1: ae3e287f932e54468f3cef901c760a5d69aec0b4 SHA-256: 63707544d79f86d54a464c8bc6bce806bebde405523891b72708276350eb1c75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=how+much+does+pikachu+illustrator+cost PDF link annotation
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/gujinitezawu.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/bobekogakamerito.pdfIn PDF document text
    • https://pudesuvake.weebly.com/uploads/1/3/0/9/130969082/a8bab78ceb0655.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/what_to_eat_at_taco_bell_on_weight_watchers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_6024083f9c4e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fc71ba20bf63.pdfIn PDF document text
    • https://bejetatibuket.weebly.com/uploads/1/3/5/9/135957672/disedowade_jogid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488810/normal_5ff40bb91c05d.pdfIn PDF document text
    • https://nevuvipegigi.weebly.com/uploads/1/3/4/5/134589722/1633806.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/dopeboli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_6011a91ddbd01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sinadi/animal_vocabulary_exercises.pdfIn PDF document text
    • http://betemeparax.rf.gd/zobuluguxunaxegaxeruf.pdfIn PDF document text
    • http://kosirokuki.epizy.com/finding_the_perimeter_of_a_semicircle_worksheet.pdfIn PDF document text
    • http://zikefibuji.rf.gd/84508443645.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/what_will_the_stars_look_like_tonight.pdfIn PDF document text
    • http://duvodix.myartsonline.com/vevakapuroveritebuxetuk.pdfIn PDF document text
    • http://jokosen.atwebpages.com/5638522036.pdfIn PDF document text
    • http://kupezoru.rf.gd/what_is_the_meaning_of_sisterhood_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/blu_ray_vingadores_ultimato.pdfIn PDF document text
    • http://sarowagilujet.rf.gd/77617242003.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 5204 bytes
SHA-256: 1bf590ca696782a3dbf1019fbc9b6867b4de62d585bd846a7baa61c616f83344
font_01_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10972 bytes
SHA-256: a7b7134c5bf6a542886007e5caebcaa7fd8176458209f9f4b7e1b9f2622dc238
font_02_sfnt_off000133db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 16060 bytes
SHA-256: 5bd88bd5c44eb894b151ed33ba27cda91e6b534aa93a3b288c9f525c64baf622
font_03_sfnt_off00014872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14872 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333