Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb56f704805ccc4…

MALICIOUS

PDF

69.1 KB Created: 2021-01-23 14:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1eb68e6f4598bf8a6fa2fc674af1e48 SHA-1: ec477ba346c349b2a514910ad677c0b5de411c1e SHA-256: afb56f704805ccc43a6024693b6759057f1f82d7d5cc4d35f268ff6d9b01338d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://traffking.ru/123?utm_term=vanity+fair+bra+76380 PDF link annotation
    • https://site-1172681.mozfiles.com/files/1172681/dog_fight_2_unblocked_hacked.pdfIn PDF document text
    • http://luvetikemo.66ghz.com/jikogemananuderikofaz.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/sogabadeta.pdfIn PDF document text
    • https://site-1226241.mozfiles.com/files/1226241/61090305820.pdfIn PDF document text
    • https://turazuxutanuv.weebly.com/uploads/1/3/1/6/131606798/e089005b48ba.pdfIn PDF document text
    • https://site-1250920.mozfiles.com/files/1250920/rumegisimipebugatiwawiger.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/55391263954234.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/3868760.pdfIn PDF document text
    • https://bafupenog.weebly.com/uploads/1/3/4/1/134131575/nosujezenakajewevipu.pdfIn PDF document text
    • http://pimolala.22web.org/tulip.pdfIn PDF document text
    • https://site-1178255.mozfiles.com/files/1178255/72029515640.pdfIn PDF document text
    • https://site-1174582.mozfiles.com/files/1174582/vemakiteveroxuvimukumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jifobobaganut.epizy.com/80120761096.pdfIn PDF document text
    • http://kudawugijamino.rf.gd/form_middle_css.pdfIn PDF document text
    • http://jesebikalag.epizy.com/96506591576.pdfIn PDF document text
    • http://wupubobetob.epizy.com/historia_del_bautismo_catolico.pdfIn PDF document text
    • http://joxesovifelerav.epizy.com/43178243214.pdfIn PDF document text
    • http://julivaradisakit.rf.gd/mexiguxo.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_off0000d17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 5492 bytes
SHA-256: cffc2bcce44c55953b1540c2f82260ad5df72c70f3103bd59f57712b36071217
font_01_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 10524 bytes
SHA-256: 46b5c9676c41c9aeb4ccdf10a4789934bcc61419a6e4dbf52ff83ebebed7bef8

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