Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d11a1d32ca4c7ff…

MALICIOUS

PDF

71.8 KB Created: 2020-12-21 16:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5c2849279da6cdc4732fbdda7d98d95a SHA-1: e2da5ca115005f39ba6c85725dcadf44b9e72f1b SHA-256: 7d11a1d32ca4c7ffbf9a8d350e69279725bc240c3534af853ca1ab3c5b59a264
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure, and the presence of multiple external links suggests a link farm or distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=quit+marijuana+the+complete+guide In PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/2752665.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6ca4dc89b935f15dddeb7/t/5fce4c74eb18547f4bb36d78/1607355510156/vector_2d_cross_product.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7c6a297e1070131a54d5/t/5fdec871ef735726d26404c2/1608435827106/allah_allah_qawali_hd_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52571d26ff1194f8f7eca/t/5fd0f5bf10febc3e16e75ff8/1607529921943/88336862135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb3831c-89c1-484b-a314-38370e0e962b/schwinn_airdyne_ad7_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68393863-f606-4862-8af1-58a2fa62d890/3dvista.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/pizujapikakolunez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc280b3405d5340f333d31f/t/5fc3b0772dd96f59185e95b0/1606660216534/genilumululunajip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc562fe40f1034a5cc6d69f/t/5fd0160a89fd2c07d1f600e2/1607472651451/among_us_character_death_animation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793c6355-5277-46f9-8ea0-9dbc86b4953d/39258643788.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/84500482143.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_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 5448 bytes
SHA-256: 1510f4052771b0fa206a2d9a46db33b16541742429f00acff61994319c88c0d2
font_01_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 11064 bytes
SHA-256: a98383101fab7e44be5c5d7146f50f0c4d1ae72a7e70a17d339ce3587a4d959c

Open this report in the interactive analyzer, or submit your own file for analysis.