Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73c797c2e7c6a95…

MALICIOUS

PDF

118.9 KB Created: 2021-03-01 18:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0f2a56887f8401930628cd390503f273 SHA-1: 4c98d11ffd6327a0d8a75456a4dc8e3cd735ff58 SHA-256: e73c797c2e7c6a955b1542f421365692d2a45fb09512b8e71c8891e1ffbe05d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical PDF link farm detection and a ClamAV detection for a phishing trojan. The document contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://seumenha.ru/award?keyword=washington+dc+iad+airport+address PDF link annotation
    • http://trastenmyqort.online/startup_competitive_analysis_template7h9eu.pdfIn PDF document text
    • http://sputnews.com/kolevakasorfiy0.pdfIn PDF document text
    • https://duxujofibedusor.weebly.com/uploads/1/3/4/5/134577283/veposugitaguk.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/05cbafc9.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/4478516.pdfIn PDF document text
    • http://promooffer.site/panotofonulosk0lc.pdfIn PDF document text
    • http://sait-ok.ru/faparafunupipothf3hn.pdfIn PDF document text
    • http://stikc.xyz/how_to_remove_epson_l120_waste_ink_padaptu4.pdfIn PDF document text
    • https://jalidinetuvumun.weebly.com/uploads/1/3/5/3/135333814/530454.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/1cc5b3445.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/0c048b2.pdfIn PDF document text
    • http://tevfikyuce.xyz/dexorakigogab7lbpb.pdfIn PDF document text
    • https://woronawupewusor.weebly.com/uploads/1/3/4/6/134672267/fusavunixo.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/660015.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://s3.amazonaws.com/dozuga/lc1d150_contactor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/latest_tamil_movies_free_links.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/a_gentleman_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/34773383506.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/gavodedonovamawa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001887f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1887F 5104 bytes
SHA-256: 352b4f719d439d5d4bd2afb2f1e35ff81516f26cc07e59b864db9c368fe4d5be
font_01_sfnt_off000199cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199CD 11120 bytes
SHA-256: e7531f3aaa685ea5c9bc09c57109ba574605601696a31934e9f7c2c5a8641055
font_02_sfnt_off0001bfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFBF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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