Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c750ffd7c79d67a…

MALICIOUS

PDF

40.0 KB Created: 2020-04-01 15:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 15e71d567071195afe681407dd9b9528 SHA-1: 7c321b08c4fef66771f32a95eb21afa346f66864 SHA-256: 1c750ffd7c79d67acc8b30961d7f0854471c6366b3bea5751608897fa3fef9c3
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary purpose of the document is to redirect users to a network of websites, likely for SEO spam or to serve further malicious content.

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://theflankoutside.com/uploads/1/3/0/4/130490681/130490681.html#isomeria+cis+trans+e+y+z
    • http://cabinetmakersipswich.com.au/uploads/1/3/0/8/130813921/0dd0159.pdf
    • http://syxgraphyx.com/uploads/1/3/0/2/130272340/sowezavawafet-nudafizadi.pdf
    • http://edradvisors.com/uploads/1/3/1/4/131483245/3455882.pdf
    • http://gwcclub-bchs-2019.com/uploads/1/3/1/0/131070895/6538516.pdf
    • http://wrhslax.com/uploads/1/3/0/7/130775647/f236f1382136.pdf
    • http://statordrone.com/uploads/1/3/1/3/131381151/kixidenasaxetunaron.pdf
    • http://ward3organization.com/uploads/1/3/0/8/130814874/doros.pdf
    • http://trailsafetyoutfitters.com/uploads/1/3/0/6/130620971/541569.pdf
    • http://sorellabeaute.ca/uploads/1/3/0/6/130605119/1d326fc7d2496e.pdf
    • http://westcorkholidayhouse.com/uploads/1/3/0/6/130604637/boroxaxu.pdf
    • http://andwatnow.com/uploads/1/3/0/4/130490977/1238537.pdf
    • http://simply-mro.com/uploads/1/3/0/9/130969304/zowemel_faximato_sujoguzoladeral.pdf
    • http://prescottsoccerclub.com/uploads/1/3/0/7/130776605/0e3767b205f21.pdf
    • http://bpmdanceradio.com/uploads/1/3/0/5/130589057/jesapazadi_jiwozutapoze.pdf
    • http://altekameraden.org/uploads/1/3/0/4/130476766/wegedot.pdf
    • http://imesuccess.com/uploads/1/3/1/3/131379538/112f4e1.pdf
    • http://nbarth.com/uploads/1/3/1/4/131406181/veruzefopitebob.pdf
    • http://negsbestthing.com/uploads/1/3/1/3/131380354/todiwabizujojedago.pdf
    • http://genesis-fitness.net/uploads/1/3/0/4/130435794/kakadidaf-mujovapes-zawofenifenuna.pdf
    • http://healingfamilyconstellations.com/uploads/1/3/0/6/130639139/tonumake_jumojetin_gozupezafawoxa.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_off000070f1.bin
4a0fb094adf57f906962f7d863192e4c41c55ed97a8a4d3c0575ce86b21f2ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 9596 bytes

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