Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c68ee063474c5dc…

MALICIOUS

PDF

81.7 KB Created: 2021-05-23 11:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9b1490d19a1febc89f155d1610492d04 SHA-1: a8410d744d24a052b286e847bbdfd9d8cfd59ba5 SHA-256: 3c68ee063474c5dc752e32d487b0de31207d0f91c109d46979a52fb3be56bfc7
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, many hosted on disposable domains like weebly.com, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of a UTM term in one of the URLs further supports a campaign-like activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://soxebez.ru/strik?utm_term=how+often+can+you+use+garnier+nutrisse PDF link annotation
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/fopasomiwu-sajum.pdfIn PDF document text
    • https://jogotipopawufi.weebly.com/uploads/1/3/0/7/130740597/dowupewafi.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/fe0892df.pdfIn PDF document text
    • https://fekipasipoxow.weebly.com/uploads/1/3/1/6/131637207/9989695.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/ruduni_raruzosawa_votowibes_pisulezefileme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5ff52bab43086.pdfIn PDF document text
    • https://wepopoxewu.weebly.com/uploads/1/3/1/1/131164118/4f8e7f61eac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465545/normal_6014c5b905643.pdfIn PDF document text
    • https://wijugiretatito.weebly.com/uploads/1/3/2/8/132814958/wefowu.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/walobofiguxuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_605494ebd8c25.pdfIn PDF document text
    • https://beponelife.weebly.com/uploads/1/3/1/1/131164358/341d18e6cdb0c6a.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/4263913.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/rutorakeg.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/194b78e5-868c-47ea-a815-5580f406a29e/radical_acceptance_handout_dbt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/babd1ef5-52bf-4f3d-8570-79feab6e1578/how_to_use_a_kenmore_top_load_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd76eba-45d3-42c7-9c7b-e0d980a91352/luzegesokolapotok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7b9e9e-fdfc-4195-8b16-9509b0eb04d6/jude_the_obscure_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e8f359-94b6-4db7-94b1-e7ba5c1189ed/como_hacer_la_escenografia_de_una_obra_de_teatro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298d3050-87d4-43f2-bd6a-1de86a3f627e/lelifotibopodisegumenib.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_off00010178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 5172 bytes
SHA-256: 45de2e19b50f8b9e35ebe4d187c271cea174508999221b304e50a8a58b3de64b
font_01_sfnt_off0001133f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133F 11260 bytes
SHA-256: 1db1081acf1ca7366a084f83f799e34ac802ba78f1b521f54e8f501bbe40c1a7