Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a7bb8184c60e09…

MALICIOUS

PDF

40.2 KB Created: 2020-03-26 07:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d780d71e6362937d78fd69f75191ce52 SHA-1: a3f81e08dcdb003a47e91f5d179e8dc030214f1b SHA-256: 56a7bb8184c60e0906af8400e6cafb33605e1c1ae1ce15bc2e328f54e9780e66
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to PDF files hosted on various domains. The document body text, though partially corrupted, includes the phrase "Forensic science books for beginners pdf", suggesting a lure to trick users into clicking these links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link farm.

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://feminarsministry.com/uploads/1/3/1/3/131383581/131383581.html#forensic+science+books+for+beginners+pdf
    • http://stormdrinker.com/uploads/1/3/0/6/130639055/komabesavamim.pdf
    • http://cardsmovinginc.com/uploads/1/3/0/8/130874261/6657895.pdf
    • http://mx.avianoreunion.com/uploads/1/3/0/3/130323412/nevig.pdf
    • http://sodizin.net/uploads/1/3/0/6/130639552/3ff4802e379.pdf
    • http://www.htsmedia.com/uploads/1/3/0/3/130379289/d8849ea7.pdf
    • http://templetonlymphedema.com/uploads/1/3/0/5/130543188/f520a77.pdf
    • http://www.cherry-tree-creative.com/uploads/1/3/0/6/130639437/f02ad36c6c8.pdf
    • http://annchang85q.com/uploads/1/3/0/2/130289530/9d6190e848.pdf
    • http://justscarves.net/uploads/1/3/0/5/130542727/buxatixebowo_mozepegiwuzol_xivobase_pazilifogaz.pdf
    • http://matthewscottrobertson.com/uploads/1/3/0/7/130739224/1588407.pdf
    • http://mail.biasranch.com/uploads/1/3/0/5/130551589/sewujeni-rosesudeborivil-bebep-pidegudav.pdf
    • http://pankydean.net/uploads/1/3/0/5/130541140/lazalixog-pitizu-zawalal.pdf
    • http://owltribewomensfitness.com/uploads/1/3/0/9/130969938/f22ef9b8b7e69d.pdf
    • http://ergonconsulenza.com/uploads/1/3/0/7/130739383/zufuroboxemopi.pdf
    • http://dmacomsultingservices.com/uploads/1/3/0/7/130738847/lazobepekekebax.pdf
    • http://bikehirearanislands.com/uploads/1/3/0/6/130639258/fudubusuxurusom.pdf
    • http://thesteaklab.com/uploads/1/3/0/6/130620632/guzobuwebizalin.pdf
    • http://concourssocial.com/uploads/1/3/0/4/130488851/6886056.pdf
    • http://tedxquotes.com/uploads/1/3/0/4/130477890/satetije.pdf
    • http://www.theholyrosarycompany.com/uploads/1/3/0/7/130776779/43659.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_off000073f1.bin
b8b0c440fe9cefd0e1d8a30c1a12567fef848a31dceb14a4a3aa2f880635532a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 8092 bytes

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