Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd574c60d20749ec…

MALICIOUS

PDF

42.5 KB Created: 2020-04-02 23:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8babfeffef18869320c194a446faec3b SHA-1: 034ced41eec606562b97f007e6dcb9f19117d2e6 SHA-256: fd574c60d20749ec0bb87b4389213a2eb28a56b5f6677c6b3c31bafac95160a1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body contains garbled text along with some of the URLs, indicating a potential attempt to disguise the malicious nature of the links. No scripts were extracted from this sample.

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://roofersincolumbia.com/uploads/1/3/0/6/130621033/130621033.html#kagan+cooperative+learning+strategies PDF link annotation
    • http://spectrumwellness360.com/uploads/1/3/1/1/131164046/29b8d.pdfIn PDF document text
    • http://referral360network.com/uploads/1/3/0/7/130775017/dosanu-kekexojufaxos-xujanuj.pdfIn PDF document text
    • http://mineviewaero.com/uploads/1/3/0/5/130588834/werosiriduletus.pdfIn PDF document text
    • http://the-personalised.com/uploads/1/3/0/6/130620486/muvetenogitisolunug.pdfIn PDF document text
    • http://mercysolidarite.org/uploads/1/3/0/7/130775476/8fafb9f9.pdfIn PDF document text
    • http://delmishousekeeping.com/uploads/1/3/0/3/130312912/kilukowegoduw_fojibopibuk_pitabixon_xonumugod.pdfIn PDF document text
    • http://salientarmsusa.com/uploads/1/3/1/3/131379629/1486419.pdfIn PDF document text
    • http://ashleighpetts.com/uploads/1/3/0/2/130287882/nufobuxebasef_likabe_zagave.pdfIn PDF document text
    • http://integratedcommunity.info/uploads/1/3/0/5/130588595/xuvifavudumu_nadinuku_sagatuju.pdfIn PDF document text
    • http://artofmoses.com/uploads/1/3/0/6/130620842/4779746.pdfIn PDF document text
    • http://financialliteracy101.net/uploads/1/3/0/8/130874066/jisejud_fevadefedo_nulupag_pafakedamo.pdfIn PDF document text
    • http://buyonline.blog/uploads/1/3/1/4/131406092/2d7d644d.pdfIn PDF document text
    • http://emporiobs.com/uploads/1/3/0/2/130273872/pizoje-wufiz.pdfIn PDF document text
    • http://skinqueenz.com/uploads/1/3/0/6/130621048/xenerezajete.pdfIn PDF document text
    • http://lauraholmanbyrne.com/uploads/1/3/0/6/130620555/7525192.pdfIn PDF document text
    • http://jobs-kuechenhandel.org/uploads/1/3/1/3/131384636/276309.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 8256 bytes
SHA-256: e2c5b883f037d2da42629d94dd9c4d7349d206b9c67bfa801bc55d08453f3be7