Malicious PDF — malware analysis report

Static analysis result for SHA-256 57160c99f5994983…

MALICIOUS

PDF

66.7 KB Created: 2021-03-25 08:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 053d55bec236047677e45ca53ca7cbf5 SHA-1: 9927a41ade327666d0b56eeafbfe2202033a76db SHA-256: 57160c99f599498333b3d5ce1cb5bb5eead4bd709ff2af110a9b461e3a5ff7d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://soxebez.ru/strik?utm_term=sears+craftsman+41a5021-3g PDF link annotation
    • https://cdn.sqhk.co/nusuguponu/JQ9ifhe/44887300903.pdfIn PDF document text
    • http://tufinanegonaj.medianewsonline.com/serimovop.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/50193302267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_6038e710a2074.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/mitojanividonabi.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/lhb9RmO/online_marketing_degree_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/hchj46o/81582935691.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/xopumiv-belesibon-vudesa.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/49hhwgc/tornado_alley_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/wowasuperan/ihgqgha/lovin_on_you_luke_combs_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408186/normal_5fefb5bf572c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_604bcb1d20dce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_ba32211acbc14039aefcc06cb47703cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/rupukisuzob.pdfIn PDF document text
    • http://pisonepegosa.myartsonline.com/aspirer_site_web_en.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/81784812564.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/giluxudawutofiwita.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/bootstrap_landing_page_html_template.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_210585aff89240dfa5adcfa7eb95076c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/zawupojelupoz.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_1f2ab8ab74fa4914b748a317fee67bba.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_8da382cd81b54340bde6fa0c8970bcd4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44C 6008 bytes
SHA-256: 2ebda6ef5dd6eead48dc9275118a79edf851fe9b8847c4c7d759db8faffcdb88
font_01_sfnt_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 10788 bytes
SHA-256: 3366dbd920443ba7d40fc67f5a3e9ebebde1cd42f13687e657f5baa357512d01

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