Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc8ec5dbd93395f…

MALICIOUS

PDF

79.5 KB Created: 2021-04-02 23:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31009256ac8a9b1bf172af6a5fe87b3e SHA-1: a08d5dcc1ffee3a8039067cd4b004f53de11d436 SHA-256: acc8ec5dbd93395f1b7cd4ca04d723c67be3df1e2f6c19142637d19d6a8d5ebf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://golowaki.ru/wix?keyword=tribal+wars+guide+troops PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460072/normal_603535f55b988.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/ncjbNha/mountain_climb_stunt_2_game_download.pdfIn PDF document text
    • http://jonezuno.22web.org/mavapuxigomupa.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/xazosedopaduxi.pdfIn PDF document text
    • https://lifowedo.weebly.com/uploads/1/3/4/7/134707215/4577675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_604b1d90a11ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_6013e63de5453.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/69122977547.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/haaUFb8/mountain_bike_tires_29.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/what_is_the_text_structure_of_the_first_paragraph.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/asterix_at_the_olympic_games.pdfIn PDF document text
    • https://gerunujixode.weebly.com/uploads/1/3/1/6/131606408/d620c516.pdfIn PDF document text
    • https://sozazajigosana.weebly.com/uploads/1/3/0/7/130739782/5221214.pdfIn 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/404b1a7c-684b-4f1b-a341-467ea56f2822/pekovawasogodebe.pdfIn PDF document text
    • http://domekitopep.rf.gd/tapurakane.pdfIn PDF document text
    • http://mezexefobotero.epizy.com/kewofora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22ed457-152e-446c-be91-9ed61109f7f1/97697875048.pdfIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/fipifax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7109d9ac-aa27-4c78-b347-064f2fb50c67/last_fm_scrobbler_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7e5c60-6f66-4ca2-af22-1ad2fff8441b/tesexumepetuwuxe.pdfIn PDF document text
    • http://zujakogi.onlinewebshop.net/simple_perfect_tense_exercise.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5308 bytes
SHA-256: e48e85070ea33dca89ea2eb2a8ebd1136378f690449485e95a68fb046fa74728
font_01_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 11640 bytes
SHA-256: 7852f5b556be342e4706af6b491c2a8f3716f265dec98dd81e0f73e5b27a8fe1

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