Malicious PDF — malware analysis report

Static analysis result for SHA-256 972b4a916204368e…

MALICIOUS

PDF

97.7 KB Created: 2021-05-12 16:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4a1185ee6ba65c067b46ac8b7cbc1f0 SHA-1: de2f0e2f6fda2c36074b947af3a90ae2b5ed4189 SHA-256: 972b4a916204368e3f2d5924e2d9b0223ae516baa71e82a7889dc0b5afa534ca
126 Risk Score

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 0.9988

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://jumiwimov.ru/strik?utm_term=bhaja+govindam+lyrics+english+translation PDF link annotation
    • http://nncucuucuc.space/bertrand_meyer_bookeijpt.pdfIn PDF document text
    • http://gobotujadix.22web.org/sahih_bukhari_hadith_15.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/gaFfidJ/26395422270.pdfIn PDF document text
    • https://zebotulebile.weebly.com/uploads/1/3/6/0/136052074/4d7544e8dd.pdfIn PDF document text
    • http://ttttrrrr.space/257174704964fcw6.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/hgiIijM/16239664132.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/79a7db.pdfIn PDF document text
    • http://afracheat9.xyz/33839776960spy5u.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/jazed_lejofafuk.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/cEhczGz/pipiviretag.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/xemuwawe-xikup-vonumem-rasilo.pdfIn PDF document text
    • http://websecurer.tech/51682474449sybl9.pdfIn PDF document text
    • http://nukicew.xyz/pirojat8ngf7.pdfIn PDF document text
    • http://diwokaxojizo.iblogger.org/political_psychology_noun.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/qjjidxR/34735406498.pdfIn PDF document text
    • http://b0xberry.online/crossword_puzzle_maker_in_englishtbkf6.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/xivigemenetoxamurovefurun9k3s4.pdfIn PDF document text
    • http://gojuwogerex.iblogger.org/refuxolenekele.pdfIn PDF document text
    • http://afracheat8.xyz/dictionary_synonyms_and_antonyms_apkfio4i.pdfIn PDF document text
    • https://lamekibig.weebly.com/uploads/1/3/4/6/134652122/linapuzesidabej_bijataxuden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_edb0b099c77f46ec8eff0442f7b2e4bf.pdf?index=trueIn PDF document text
    • http://nukobis.rf.gd/xilalidupexosusujidoxolot.pdfIn PDF document text
    • http://lofupiwosilabo.epizy.com/83511418174.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_cc85dd155df44fca975885e7be5128d0.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA6 5640 bytes
SHA-256: fa20dd9685153b9577a4111f1fce945675ae0476b4291f1789503fa7753185bf
font_01_sfnt_off000141be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BE 4780 bytes
SHA-256: f5d7bc036e7626666bc78ee82d556fccf0c16d535931741432870b9a76f4ad7e
font_02_sfnt_off00015105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15105 12248 bytes
SHA-256: f8c2d08739ac6824f08f97bc8f3328215d635664932a54349fb1f015f04aa132