Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c95947e16f7e75…

MALICIOUS

PDF

76.7 KB Created: 2021-04-21 01:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 75788707a1ed5402160f38ac99cc38b3 SHA-1: 897985e45b91f51bacbc5985b022022b4daee2ff SHA-256: 37c95947e16f7e75258cabeaaaebcc6d602250c78b051cd51d16565eef436489
164 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. It uses an urgency-based lure. 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xajibur.ru/strik?utm_term=covid+birth+partner+rules PDF link annotation
    • https://kovozewiridudu.weebly.com/uploads/1/3/0/7/130738567/relotiraf.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/hcYFl37/xilaxoweperemila.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/hb2iKHZ/88101237218.pdfIn PDF document text
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/vonavozi-lonewelumuve-vukom.pdfIn PDF document text
    • https://jebigifapiw.weebly.com/uploads/1/3/1/3/131379276/0f238a2baf.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/5786e3.pdfIn PDF document text
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/92e15566.pdfIn PDF document text
    • https://tagosijotibaza.weebly.com/uploads/1/3/1/4/131407106/refozavokotowefanok.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/9efb478f4.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/E5Miagg/monster_trapper_bug_killer_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapunujunet.epizy.com/92847947439.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/what_is_coding_in_computer_science_engineering.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/bookworm_adventure_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/bojod.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/25708812527.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/hey_you_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/bournvita_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/99605714910.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/62708949542.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/87128147962.pdfIn PDF document text
    • http://kotasivira.rf.gd/caverna_do_drago_final.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 5152 bytes
SHA-256: 82d3e4efb6757b48c2b03bd6e43edbbb247d8c28f4ef34c39659f41b3bbed964
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 10948 bytes
SHA-256: 179b575289f4bf1b7774606e26cd6b694ad94ac6b67ae015cde2e70247924695

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