Malicious PDF — malware analysis report

Static analysis result for SHA-256 70bec5a95fced2aa…

MALICIOUS

PDF

43.7 KB Created: 2020-04-13 13:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 65a4580fea335087e9fb2ab1182ab4a9 SHA-1: f7e7d01dee1ce7df521f230176cb22392cdeba39 SHA-256: 70bec5a95fced2aa36dde0d82460d245f5253c7c2462a4c1552bc2e9399428c8
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious document designed to lead users to external sites.

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://cynthiavalero.com/uploads/1/3/0/8/130815097/130815097.html#que+es+demografia+en+marketing
    • http://canadorepostproduction.com/uploads/1/3/1/3/131380988/0c032bb9e6ccbc.pdf
    • http://atlartchurch.org/uploads/1/3/0/9/130969981/5674005.pdf
    • http://backpackentrepreneur.org/uploads/1/3/0/4/130488694/1200083546eb76.pdf
    • http://candlelight-rsk.com/uploads/1/3/0/6/130604270/6f0e1.pdf
    • http://genonecharlotte.org/uploads/1/3/0/6/130604133/sozawa-fogurigurilote-nipawefeji.pdf
    • http://km33tulum.com/uploads/1/3/0/2/130272440/4fbf138eb19d.pdf
    • http://pcslogic.com/uploads/1/3/1/3/131384374/8fd4a395bb.pdf
    • http://505waterfordpark.com/uploads/1/3/1/3/131379836/8984557.pdf
    • http://obidistributors.com/uploads/1/3/0/6/130604502/51f6481d94.pdf
    • http://motors-auto.com/uploads/1/3/0/5/130551222/mebuz-gupugidali-tarokufebe.pdf
    • http://zfehomes.com/uploads/1/3/0/9/130968920/8879791.pdf
    • http://jmswankblog.com/uploads/1/3/1/4/131406785/vopepufaxuduzujuras.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_off00007ed6.bin
50a1fca1d6cb46a750ae4cd42c9a0996fbf78eb057bedc4e715684f244ba4219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 9484 bytes

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