Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a30e0e45d06892f…

MALICIOUS

PDF

69.2 KB Created: 2020-12-10 21:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8f55b1b85e12c75838c4bb9b70ec1b9d SHA-1: 151e2e82b766f3275f495e92c2a31625ee6046f7 SHA-256: 8a30e0e45d06892f470513c04a98bd6b86d0355bb12015dc80c233392faf9897
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. One of the embedded URLs, 'https://trafficel.ru/123?utm_term=betsy+aardsma+suspect', is directly associated with the document's content and likely serves as a primary lure. The ClamAV detection and ML classifier also strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://trafficel.ru/123?utm_term=betsy+aardsma+suspect PDF link annotation
    • https://fokorakadugapo.weebly.com/uploads/1/3/4/4/134444193/e78a9a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5fb7d6358c154.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/jatodinubajebok_wiwegekusamomer_miworadopew.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/pitepekapizuvo_zepilufefebog_vonabenejabadad_radaximowexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f97e547bad80.pdfIn PDF document text
    • https://lurabesuweki.weebly.com/uploads/1/3/4/5/134524451/dodewetexaset.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8985da0-7724-4161-9d6c-8c240de887cf/5888281946.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/47320135862.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/69896738501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ad71f7-4d87-4e20-bd63-cbc40df456e3/list_some_negative_calorie_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/45114066514.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/mathil_armageddon_brand_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/3421271659.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/mac_spoofing_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34df2e1-5d1c-4c60-aef4-99dec5368e8f/2004_cadillac_srx_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8b5eb6-f86f-42f8-a043-ee2b442be21c/justine_bateman_family_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/mvc_ajax_post_multipart_form-_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c32957c-e661-4a70-ad27-1be8abcf4cb5/description_of_trees_in_a_forest.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_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 5340 bytes
SHA-256: 7f564c2e60a0bd5b3a31ffd7ce206657a8668f1936f035e27daaaaa4bc05546c
font_01_sfnt_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 10576 bytes
SHA-256: dd065188e6785f5f1a86bf38889d6934cfb1f01fea8f9562e04a5afb51d0ad54

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