Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc9be13ea4526d1…

MALICIOUS

PDF

95.8 KB Created: 2021-03-20 17:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 74be277693bb700480b6b64718d10b11 SHA-1: 282c22fd5b33f60a606dea3fe63dfede5c1800e2 SHA-256: adc9be13ea4526d12f882e8ec3174af1687c92c794a7a2b0c4a96b59e43bdc6a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with a primary one pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt disguised as a free diet system download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a malicious intent to distribute content via numerous disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://fokemale.ru/wix?keyword=the+3+week+diet+system+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391305/normal_6030cdc8c22e0.pdfIn PDF document text
    • http://migriruy.ru/xagolesip0sd0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451954/normal_600b680d547bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_601b40eacd2be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_600e699067746.pdfIn PDF document text
    • http://rabota-plus.club/how_to_use_frigidaire_dehumidifier_70_pintyzezy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffb1362c16e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450003/normal_60052d8ded379.pdfIn PDF document text
    • http://gawudubigojan.getenjoyment.net/artificial_intelligence_movie_summary.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/162993390.pdfIn PDF document text
    • http://petersikdar.com/46098422755oo3wt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fc9899044459.pdfIn PDF document text
    • http://fitness-ital.fun/bil_batori_meaning_in_englishf4w2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_e2e092326a1946ad945435944fc7f572.pdf?index=trueIn PDF document text
    • https://d7504aae-3d37-493f-8789-a5629a6fcc30.filesusr.com/ugd/7ca9f5_c73170c5aae644cb858532bbc1f3bf89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/nifimebagogagonizezaze.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_ac77170a44114a6986be55ef16113795.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/dupenutawug.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/45938240459.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/gilmanton_nh_town_report.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_e608c28714cc402b99a8f72328477279.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/87542336695.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/ferukodazudojigo.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_off000131f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F7 5652 bytes
SHA-256: b504936e80564d0885b85827abdc3a265a07bee96a697e0b5c4ea71da8a435bb
font_01_sfnt_off0001451b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 12664 bytes
SHA-256: 014049ea547e776512ae3bf46bf22cd556f7f0f29a93ecb2044e878885abc4b3