Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ed7df804dbca7b…

MALICIOUS

PDF

113.3 KB Created: 2021-03-18 13:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fae9b024008ebb9927d2c20286f7f8f4 SHA-1: df6436568fbb9a9680d8649c1348a2e96ec2325e SHA-256: a4ed7df804dbca7b20d6d7ef23ff8e50c75d1165601392c1c508b31425c51b28
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 0.9990

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://midufefew.ru/strik?utm_term=the+vampire+diaries+does+damon+die+in+season+8 PDF link annotation
    • https://cdn.sqhk.co/lupejatuwi/PjhVgfE/mopoj.pdfIn PDF document text
    • https://gurugurib.weebly.com/uploads/1/3/1/3/131384113/1846102.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/7082337.pdfIn PDF document text
    • https://gegizadewer.weebly.com/uploads/1/3/1/4/131482997/bitetavapewajogenexa.pdfIn PDF document text
    • http://dvertsoff.ru/5498784342ssbcr.pdfIn PDF document text
    • https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/8631982.pdfIn PDF document text
    • http://nakomajuvedina.iblogger.org/aceable_permit_forms.pdfIn PDF document text
    • https://miremawa.weebly.com/uploads/1/3/4/6/134631892/6653703.pdfIn PDF document text
    • http://daxepekudinis.iblogger.org/sokakukoweluketifobukafov.pdfIn PDF document text
    • https://pasetesosetoje.weebly.com/uploads/1/3/0/7/130775590/lutozumol.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/GhaY0jh/48162963862.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/ee955112584f9.pdfIn PDF document text
    • http://iwhite.space/bifenajodaronu6olbj.pdfIn PDF document text
    • http://microdigitalmeter.xyz/fire_and_ice_restaurant_hourse1jlv.pdfIn PDF document text
    • https://wowiwega.weebly.com/uploads/1/3/1/4/131453904/jobid.pdfIn PDF document text
    • http://xukavegogeb.22web.org/how_to_patch_sims_4.pdfIn PDF document text
    • http://xteenware.online/5191995371xtr4y.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/gjharzR/free_equalizer_for_mac_sound_output.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/basic_electronics_books_file.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/free_autocad_2006_crack_keygen.pdfIn PDF document text
    • http://nazozogev.epizy.com/esl_business_english.pdfIn PDF document text
    • http://lozefedewi.rf.gd/95778014771.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/table_of_contents_template_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E21 5080 bytes
SHA-256: b8a290d5c8e099484a48bfd3e7d7a64898f2bb361eff31d7d058031929631277
font_01_sfnt_off00017f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F34 12592 bytes
SHA-256: c9a2ca627168dacaca584d714262e1c3e5a8891593f7cbc6df45a159bcc66aac
font_02_sfnt_off0001a9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9E5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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