Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb6b272c86e7e56…

MALICIOUS

PDF

89.2 KB Created: 2021-05-18 05:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69524d8abbcb2e0d2db5d1ebd68688ab SHA-1: 70fda1c5f765beebbc2832df176d8f4ee28b7b28 SHA-256: 6bb6b272c86e7e564a4b557ad5d35667e4428048fa9f0dfa0b7ce9a462fa34eb
156 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. 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 0.9989

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 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.
  • 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://maypoin.ru/strik?utm_term=yeezy+boost+700+inertia+fit+true+to+size PDF link annotation
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/4023326.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/bd2acef383.pdfIn PDF document text
    • https://xogegexisupu.weebly.com/uploads/1/3/4/3/134319275/2346888.pdfIn PDF document text
    • https://tabekemaw.weebly.com/uploads/1/3/0/8/130874329/240d035789c.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/26ef3905fbcb372.pdfIn PDF document text
    • https://dovavifedudefew.weebly.com/uploads/1/3/2/7/132710721/xotuzamagiriw.pdfIn PDF document text
    • https://sexetolekik.weebly.com/uploads/1/3/4/6/134632248/9460288.pdfIn PDF document text
    • https://dadanesikukuno.weebly.com/uploads/1/3/1/4/131438481/nuvegovofaxi.pdfIn PDF document text
    • https://moredotaze.weebly.com/uploads/1/3/0/7/130776260/jewojededas.pdfIn PDF document text
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/kixegolojamepok.pdfIn PDF document text
    • https://jaxefosizi.weebly.com/uploads/1/3/6/0/136083017/jinudak_luvulevi.pdfIn PDF document text
    • http://fafasun.iblogger.org/auto_blur_background_software_free.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/jusagi/asus_rt-ac67u_ac1900_aimesh_2p.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/the_armchair_economist_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/sexatugesevaxoritutoso.pdfIn PDF document text
    • http://tejozusob.rf.gd/android_boot_manager_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/duxerobex.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/putebenezesatelunelupepe.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/45607688030.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/36001862782.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/android_textview_bold_color.pdfIn PDF document text
    • http://xaninulutinofeg.rf.gd/zesasanekobinimo.pdfIn PDF document text
    • http://nanaxaj.rf.gd/voneleseno.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/53814365113.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/3841089037.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_off00010edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDB 2960 bytes
SHA-256: 4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac
font_01_sfnt_off0001194b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 5204 bytes
SHA-256: 3da6b9c65b63e304715405ddae446d6641c8e21f041124124f67f56f2ca791dc
font_02_sfnt_off00012b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 13440 bytes
SHA-256: 4d3a561fe2cdf4bd55dc7c157a53a3bfbcbfd90b3c65bec03055bed14630e7f8

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