Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fa463bbd8abfae…

MALICIOUS

PDF

47.8 KB Created: 2020-03-06 16:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 293ba9b7314454a38b19a7b593dc5be5 SHA-1: 5b2321ba2eda59648d1d43d5b1d4d3a3f128b671 SHA-256: 40fa463bbd8abfaeb032b021f115732104d811899c3185313ccdecd605b343c3
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The primary intent appears to be directing users to a network of potentially malicious or spam-related content through these numerous embedded links.

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://beingself-centered.com/uploads/1/3/0/5/130589313/130589313.html#derivative+trig+functions+pdf
    • http://davidpresserdds.com/uploads/1/3/0/6/130622092/b28547c3.pdf
    • http://writerkelseydanielle.com/uploads/1/3/0/3/130313613/8797582.pdf
    • http://butterflykissescrafts.com/uploads/1/3/0/2/130287441/224bbd7ca7.pdf
    • http://westernthriftyinn.com/uploads/1/3/0/6/130604473/140761.pdf
    • http://chinesebiblewiki.com/uploads/1/3/0/7/130739369/duvorepif-kupogivurenoka-jibevi.pdf
    • http://surfsideplayhouse.org/uploads/1/3/0/6/130621285/b003d882f81c453.pdf
    • http://luxseek.com/uploads/1/3/0/6/130620859/limitinot.pdf
    • http://metcalfe4pa.org/uploads/1/3/0/7/130775063/6a240d9.pdf
    • http://tospublishing.com/uploads/1/3/0/6/130604264/eb7a19.pdf
    • http://www.greatteethtoday.com/uploads/1/3/0/5/130546391/7933104.pdf
    • http://fashionland8.com/uploads/1/3/0/3/130379864/480556.pdf
    • http://practicalss.com/uploads/1/3/0/5/130551270/6253319.pdf
    • http://haroldhowell.com/uploads/1/3/0/8/130814169/513049.pdf
    • http://websitessimple.com/uploads/1/3/0/6/130622106/lovipapovegu-fekazatiligu-zoxuna.pdf
    • http://itsmyland.net/uploads/1/3/0/6/130603835/nebisarix_lirotiso_tivasekitudab_jafubuzajojofil.pdf
    • http://2gedar.net/uploads/1/3/0/5/130590671/xotowipezopu_fejolojulopuri_buwupu.pdf
    • http://caninesareforever.com/uploads/1/3/0/6/130639887/puxetipa_bipiz_pibag_lusatame.pdf
    • http://leoeandhyde.com/uploads/1/3/0/3/130379137/xozegomukipamadive.pdf
    • http://technipropre.com/uploads/1/3/0/7/130738531/7407434.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007297.bin
e3a6ce9adc160eb45163a622bf3e18559ccc498e7624fddaa9be560ed61e108e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7297 7708 bytes
font_01_sfnt_off000090dc.bin
cad7a40a2a5e2cbdceb26eeedc0927a575627378e4c0715cb19aa73089b782df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 3024 bytes
font_02_sfnt_off00009b98.bin
af7c27c8d3bc8b38d767c5da01f41f15c8d54ab43c71990c1d01f4ecc246abbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B98 16164 bytes

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