Malicious PDF — malware analysis report

Static analysis result for SHA-256 3021d492a7531ffb…

MALICIOUS

PDF

129.7 KB Created: 2021-03-05 20:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fa626958a2e98c0fcf70c953780fdefa SHA-1: f97e308a85a4dadf9b6573541a522a13f3696d04 SHA-256: 3021d492a7531ffb2310c373eb8534939cd14773177a2b7bdb2a59f5e58f2cbe
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spam operation. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious or spammy content, masquerading as a game guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/wb?keyword=pillars%20of%20eternity%202%20deadfire%20game%20guide PDF link annotation
    • https://cdn.sqhk.co/suxunuke/jdigjje/sonamax.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/vibow-tiputiwutedig.pdfIn PDF document text
    • http://studytogether.fun/lijekababodedemelemomofaplvspx.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/e9jhthh/monkey_go_happy_western_2.pdfIn PDF document text
    • http://axecheat6.xyz/50523947046h96w0.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/2800997.pdfIn PDF document text
    • http://itabody.space/companion_to_applied_mathematics_1_kumbhojkargwxmg.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/0bcb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_6016a55a449df.pdfIn PDF document text
    • http://lightsex.ru/60232789068m5wzg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471455/normal_5fca8f0fb8f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_5fda49f584d89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_6023701370835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_10e605b8a6334706b8ef9a47ec74c3f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/free_nine_ball_pool_games.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_51d081afd5934ed6bc7014e0543c4d32.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_7d91aa05cbae4c9cb883639ecdfbe1ee.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_9b9531bf6e584241b1a09c556a4221bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/fb_messenger_ing_photo.pdfIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_1421ae784c704d69ab91a2059b748231.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/free_editable_wedding_table_number_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/answer_to_the_impossible_quiz_question_18.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/meseteli.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_off0001c14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C14A 5464 bytes
SHA-256: 337f74de4d4ff5585d84d13c6cdd6b94783fed80add9372c5305e54a5846203e
font_01_sfnt_off0001d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3D4 10924 bytes
SHA-256: 05d0e48f76001c1f023e20089833b0c1cc1831fc3fca21c5d3082ce64684c650