Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb06181e3f1f314…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 16:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05f43b44942bff9416c12113591fa7a7 SHA-1: fb8d232041df2d422d4ced570094ab36dbe1fd70 SHA-256: 6eb06181e3f1f314aba586e689e843e32db1d29c5febb79f2c1b2a7f5dacb0c0
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on luring the user to download a game. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics further support a phishing or malware distribution scheme.

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://nipisod.ru/wix?keyword=real+steel+game+apk+download PDF link annotation
    • http://fabulouss.space/weekend_getaways_in_palm_springs41ejy.pdfIn PDF document text
    • http://repaircreditscore.info/links_awakening_turtle_rock_keyaqc34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_603ccaf706563.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/9167541.pdfIn PDF document text
    • http://snegny.com/sims_3_seasons_free_download_origint9rzt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff21368ee986.pdfIn PDF document text
    • http://mignonette.space/wukamuguwetofotq2nz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fe435b7920ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_601ce06e998fc.pdfIn PDF document text
    • http://tameenegypt.com/livro_energia_e_meio_ambiente_download6cv94.pdfIn PDF document text
    • http://universe1.space/the_autobiography_of_gucci_mane_hardcover42dym.pdfIn PDF document text
    • https://xaxiduxaze.weebly.com/uploads/1/3/5/3/135308656/334326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490528/normal_5ff30f3e429cb.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/tozedavepituze.pdfIn PDF document text
    • http://fbcopyright-center.com/mokivumagapux9v7id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_603ded91358be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_3134e43c87f84bfcb32bbd9e2fa7dca5.pdf?index=trueIn PDF document text
    • https://46ebecaa-9490-439b-bba6-ee77f1a6ca93.filesusr.com/ugd/cee8a1_f6a8bde7fae94a02ac9bb572786184e7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 5088 bytes
SHA-256: 84cc7340b0e223d0ac0794f21434a78179ca015247071db8bf2530d266e672f2
font_01_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 11280 bytes
SHA-256: 7f79b75676abbf78a1c81f56a581b59622fed2351558bde979b1ea359c41cf5d
font_02_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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