Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d82d6320ad29b76…

MALICIOUS

PDF

33.0 KB Created: 2020-03-23 09:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 54d9536feefe7a6d53486edb2a91d0da SHA-1: 3e700c6b02f09ff0deb34bfeda32a35b5585c399 SHA-256: 5d82d6320ad29b76801fe134e06515442966abf3bf17bbe3fffb154c40d1732d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The embedded document body text, though partially corrupted, contains a URL that aligns with the observed link farm behavior. This suggests the document's primary purpose is to redirect users to a collection of external resources, potentially for malicious purposes such as hosting malware or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://unique-security-solutions.com/uploads/1/3/0/7/130775932/130775932.html#l%27oreal+paris+feria+hair+dye+reviews
    • http://peak-sa.com/uploads/1/3/0/2/130272275/5e9a0c.pdf
    • http://bethevibration.com/uploads/1/3/0/3/130380002/kovexivitum.pdf
    • http://www.melaniejacob.com/uploads/1/3/0/4/130489417/7592244.pdf
    • http://talkaboutdomesticabuse.org/uploads/1/3/0/9/130969541/4846711.pdf
    • http://webstersnc.com/uploads/1/3/0/3/130323908/8731aaac.pdf
    • http://5lmboutique17.com/uploads/1/3/0/5/130589083/xomim-xapapeka-jajodewa-ximodeju.pdf
    • http://realhawaiimedia.com/uploads/1/3/0/5/130541356/vofafuw.pdf
    • http://madrasa.app/uploads/1/3/0/4/130476496/vixolixem_somifuve_tovuveluxuro_zasut.pdf
    • http://sportscomplexlv.com/uploads/1/3/0/8/130813648/bugemewidarezizaxi.pdf
    • http://kc-marketing.org/uploads/1/3/0/3/130379150/147023.pdf
    • http://mta-sts.mail.hundefreunde-seewil.ch/uploads/1/3/0/4/130491488/dagabigi_rilego_babaxi.pdf
    • http://republicstrength.com/uploads/1/3/0/6/130621805/6299920.pdf
    • http://blzzr.com/uploads/1/3/0/4/130483583/dubejuza_likatimase.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005835.bin
db185435e836a3397d33b996dfc2de48220b4dca9ace0faef8b3db011643b2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5835 7436 bytes

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