Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56b6e1545c3a00c…

MALICIOUS

PDF

71.2 KB Created: 2021-01-31 12:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ece4aba0f7edaa1502bdfa039834d1fd SHA-1: c5a76184fabb31b64ebfd144e27cb2470bdc9118 SHA-256: a56b6e1545c3a00c3adb4f61bb8711f5d8b688b345f2260ea9b31fcad614bd9c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for SEO poisoning or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=free+dashboard+templates+in+mvc PDF link annotation
    • https://cdn.sqhk.co/bugininaxi/hiihhbi/galaxy_shoot_alien_attack_space_shooter_game_download.pdfIn PDF document text
    • http://ecoterritory.store/which_person_is_rational_emotive_behavior_therapy_most_commonly_associated_withj7i3b.pdfIn PDF document text
    • http://fly-drive.online/79551431722ipxqf.pdfIn PDF document text
    • http://idealicaitalia-official.site/bumalatak32vb.pdfIn PDF document text
    • http://begemotiks.space/abbey_road_super_deluxe_book94ozn.pdfIn PDF document text
    • http://antonioit.fun/18270872974w2os1.pdfIn PDF document text
    • http://prodive.su/saloxuroxopovebafegatvtqtk.pdfIn PDF document text
    • http://mandarin-fruit.space/astrology_zodiac_signsdtxw0.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/jfnifhi/dawn_of_steel_mod_apk_revdl.pdfIn PDF document text
    • http://tehnotop.store/cafeland_world_kitchen_tips_and_tricksn5l1c.pdfIn PDF document text
    • http://palitra-cveta.ru/70290766966jtl4u.pdfIn PDF document text
    • http://nesobaka7.xyz/195069419183s1o7.pdfIn PDF document text
    • http://tiktokhd.design/enlace_metalico_teoria_de_bandasrxqyh.pdfIn PDF document text
    • http://begetus11ppz.xyz/nuvobusopuvukugigop2kc60.pdfIn PDF document text
    • http://iblack.space/teforirugabovck7ma.pdfIn PDF document text
    • http://ilkertr.shop/3ds_bios_download_rarqkmve.pdfIn PDF document text
    • http://justiciaforjustice.com/psychrometric_chart_dew_pointh2ja8.pdfIn PDF document text
    • http://cozyplacefor.rest/pre_kindergarten_assessmentcirvc.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/oiecWRZ/combo_critters_apk_mod.pdfIn PDF document text
    • http://love-your-lips.online/78357227877n5dqw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 5468 bytes
SHA-256: d52c648ecb53ef9bb1b3be0792b0a0ad166bbd8bcdb6415438e3b8c731eee284
font_01_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 9880 bytes
SHA-256: 3d726a6305d5340f13b39f2751bdab896688a2435d6749354692e89317eafe59

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