Malicious PDF — malware analysis report

Static analysis result for SHA-256 091ac38724da015f…

MALICIOUS

PDF

65.9 KB Created: 2021-03-10 11:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: edc2401e363d3f8d96d50d9940c866d9 SHA-1: 2d8ec32bb6b721a58bc069c808ce1a21bc6fd693 SHA-256: 091ac38724da015f9610ac5d399964944a35b0331265fa9ff9b91012cca65081
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a book title, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://pelibifir.ru/aws?utm_term=40+rules+of+love+book+in+urdu PDF link annotation
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/naxutefipujax_faronasibowom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_601eaa7a3984f.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/gghdacM/kelime_incileri_baskentler_cevaplar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465267/normal_5fe01d7d045f5.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/Dfjjwia/99696642600.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/Rjbidaw/claw_machine_game_buy_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6047cdc849570.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/aHghSgd/64052195019.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/4jhhgcJ/murderer_online_mod_ios.pdfIn PDF document text
    • https://jazebaza.weebly.com/uploads/1/3/4/6/134662006/kevoso.pdfIn PDF document text
    • https://zelerajolames.weebly.com/uploads/1/3/0/7/130776056/4797817.pdfIn PDF document text
    • https://galibemad.weebly.com/uploads/1/3/1/8/131856827/dovobamija_tisekewosevol_kutuporuju_badil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_fe53bbbcac8a48ffbf5f41795dc6f090.pdf?index=trueIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_58ab121c142843ddaedc5f21c1d47a03.pdf?index=trueIn PDF document text
    • http://jozolefifove.epizy.com/florida_keys_destination_guide.pdfIn PDF document text
    • http://xogimutidum.epizy.com/sharp_aquos_quattron_3d_80_inch_tv_model_lc-80le844u.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_c81a9ec8324e4ddfb772560f7ec30470.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_off0000c60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60F 5088 bytes
SHA-256: b6ab183b1414552473860dcd6584d62dde665b7cf8bffa1d5710502e6531d427
font_01_sfnt_off0000d776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 10576 bytes
SHA-256: caaa5f5fa43182abdd00eeae6b873a4a7bb5d370c04eef02da66bbf66cc59025

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