Malicious PDF — malware analysis report

Static analysis result for SHA-256 e105d36ba046b797…

MALICIOUS

PDF

75.6 KB Created: 2021-03-15 05:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fc0ef5d8ba85451a033f47589761f60 SHA-1: bdf713c8f5c01979cfec9e574b102562a343cdee SHA-256: e105d36ba046b797b6c03bf3f3096487cf6810ab650a3cfca35127b5298401be
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9991

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=weber+grill+chicago+reservations PDF link annotation
    • https://ritiburup.weebly.com/uploads/1/3/0/8/130814353/4375130.pdfIn PDF document text
    • https://tonusawojojumo.weebly.com/uploads/1/3/1/3/131384735/8e9b342ab47c0.pdfIn PDF document text
    • http://molipetofokeva.22web.org/keystone_species_worksheet.pdfIn PDF document text
    • https://bifuwesulowun.weebly.com/uploads/1/3/4/3/134308915/5834003.pdfIn PDF document text
    • http://xewokilazutir.iblogger.org/wasodizifasujeva.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/tebumusozekof_xosekenar_tikevugenutufit_dimogolevom.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/1565771.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/zefixodowap.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/figipagotixej.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/9038512.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_5d426bb5197a4cf9abcb19b28b0ffc03.pdf?index=trueIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_694d5ce9cff0412f9386b07fe72da499.pdf?index=trueIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_94cf3c4a25274c70bf99416fabafebf1.pdf?index=trueIn PDF document text
    • http://xuvunemomot.epizy.com/pilakomekilumejaluwev.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/chaahat_movie_shahrukh_khan.pdfIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_a79346df0fda4871a92bc276cbd20c92.pdf?index=trueIn PDF document text
    • http://duwawadava.rf.gd/fistula_perianal_causas.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/the_last_exorcism_part_ii_cast.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_cd8463676fc745719817e2ac02c4362f.pdf?index=trueIn PDF document text
    • http://pevojaxako.rf.gd/the_joy_luck_club_book_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/mupafos.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/fumuxebuloba.pdfIn PDF document text
    • http://daguvenirekeb.epizy.com/honda_hrc216_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/the_adventures_of_tintin_screenplay.pdfIn PDF document text
    • http://jesirezajirenu.epizy.com/18840211874.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_off0000e69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 5272 bytes
SHA-256: eba0e658f2f09bcc4e10f964870ed2e0e5b70d54ee88582bb709d50807996352
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 11336 bytes
SHA-256: 82d89e5d311bd1b03278534479d066fa6e2662867970a4e38f66452905657ab8