Malicious PDF — malware analysis report

Static analysis result for SHA-256 5739872e3a119b22…

MALICIOUS

PDF

74.2 KB Created: 2021-03-08 14:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc079a194388c4f54e7e0409f8408471 SHA-1: 5332beee2b76ddf886c83bd080a8c45e219a71a5 SHA-256: 5739872e3a119b22b64462e927a5d93277048b40d0b898adfedffd1e5290713a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=billie+eilish+new+songs PDF link annotation
    • http://goodsun.fun/zobizifenulikejaf477to.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/rjdeghB/81393229765.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/ejfSfRw/nutritional_information_banana_laffy_taffy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_60415238a14d4.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/hjDmgb1/royal_princess_wonderland_runner.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/Krxtyhe/tojefisazufewudejife.pdfIn PDF document text
    • https://lelibajoterudu.weebly.com/uploads/1/3/4/0/134042739/wevokavibimuminudi.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/iic0wX5/netflix_movie_download_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_6036a0abf0582.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/73af16bbfe29a6.pdfIn PDF document text
    • http://ingmijn.com/vagamikifojololamarivuerib7.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/ihgcrjf/29072524714.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/idqhehe/words_in_a_pic_2229.pdfIn PDF document text
    • http://naturmilans.fun/calicut_university_distance_education_id_card33w33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423732/normal_5ff9d6eda8e0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fd0d40a21f59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/golepe/tapiwumowes.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/nujubamowetefaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/hypertension_management_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/networking_engineer_interview_questions_and_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 4780 bytes
SHA-256: 5f1ca8e21ed2caf5e8623be4f8d96a12c07829307c3b38e81d1219deabf5c938
font_01_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 11508 bytes
SHA-256: 33cc310a8d1d2816b9b0a0d1b73a570c8f3fd07ab2cfa4c7bc87ee1b2d73049b

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