Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d783956c57b6eb0…

MALICIOUS

PDF

68.2 KB Created: 2021-03-23 15:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e0e0b6da73b1cf4f18d81fd7201c7dc3 SHA-1: cce1f0721d67926e7b583e58a68338ea60e4edc4 SHA-256: 5d783956c57b6eb0b5abd14e3957d5765c64d1d569531acd2a856528eda11f19
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it's part of a link farm or used for phishing. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=sony+handycam+vision+video+hi8+manual PDF link annotation
    • http://daddytestit.xyz/deal_genie_real_estateovbuy.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/igFYSjj/32282811342.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/PNT8Thg/fantasy_hockey_tips_for_beginners.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/6th_grade_level_reading_comprehension_worksheetskuf85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fd99ec5224a7.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/RjhgjaN/pure_web_browser_pro_apk.pdfIn PDF document text
    • https://boxusopusaw.weebly.com/uploads/1/3/1/3/131398197/6869528.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/eMJjYgg/48545784598.pdfIn PDF document text
    • http://frasqen.online/1789892604780rui.pdfIn PDF document text
    • https://gofikebome.weebly.com/uploads/1/3/4/8/134847018/tozanivivomil.pdfIn PDF document text
    • http://afracheat5.xyz/epson_wf-7510_wireless_setupw8e0c.pdfIn PDF document text
    • https://cdn.sqhk.co/makulowujip/bbxMzzb/28765245061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_604327006b3d6.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/bakoloj/95_polaris_magnum_425_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/verizon_fios_router_g1100_red_light.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/panasonic_microwave_oven_nn-sd372s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/gunilegepuzenetotafu.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/what_is_the_leading_strand_of_dna.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_off0000cc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC35 5544 bytes
SHA-256: 02a93d9b4c0c6032ff41077632fb6961d92944ec5f18685f3d3d9296b4c0006f
font_01_sfnt_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 10132 bytes
SHA-256: 63bd0a3d9cd2623d1e6bad42904928e07095767097619bae5186e7b5d9611c35

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