Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c1cf3ac2f77744…

MALICIOUS

PDF

51.2 KB Created: 2020-03-08 06:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: ad1e435e6b4c165ba994f9b28e504b8d SHA-1: f3dcd7c0643291274720bc447af20b1adc2e03bc SHA-256: d1c1cf3ac2f77744d560bfc14a7bbd1f90e8cf6586c7c8fa3c7a1e9463702b95
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the list of extracted links. This suggests the primary purpose is to redirect users to a network of websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.elegantcreations.net/uploads/1/3/0/7/130739510/130739510.html#adjective+preposition+gerund+examples PDF link annotation
    • http://moodieshop.com/uploads/1/3/0/6/130604527/xiteve-sivagazojuwujo-gezazozegew-zisumu.pdfIn PDF document text
    • http://coasttocoasthauoratrust.com/uploads/1/3/0/7/130775539/535ca295109.pdfIn PDF document text
    • http://rhsimb.org/uploads/1/3/0/6/130639038/af80564464c299b.pdfIn PDF document text
    • http://assessmentsystemscorporation.com/uploads/1/3/0/7/130739415/2c6d1f96324.pdfIn PDF document text
    • http://troshkov.org/uploads/1/3/0/2/130270812/viweror-nudegokepugi.pdfIn PDF document text
    • http://marketresiliency.com/uploads/1/3/0/5/130550682/vapem.pdfIn PDF document text
    • http://pineridgepanthergleeclub.com/uploads/1/3/0/7/130776262/1439082.pdfIn PDF document text
    • http://mta-sts.elsthijsse.eu/uploads/1/3/0/2/130272284/ladavulajoz_tidaxir_jonix_nixawapafasu.pdfIn PDF document text
    • http://thecursed.com/uploads/1/3/0/5/130538891/7550766.pdfIn PDF document text
    • http://sararupe.com/uploads/1/3/0/6/130621101/4bbe285044dd.pdfIn PDF document text
    • http://www.thefirewoodguys.com/uploads/1/3/0/7/130775145/8478569.pdfIn PDF document text
    • http://rekazconsult.com/uploads/1/3/0/4/130435573/bumixetewagibur-lekedetukubaper-ramofuxoki.pdfIn PDF document text
    • http://ministermichealburton.com/uploads/1/3/0/6/130604804/luwusuroperik.pdfIn PDF document text
    • http://www.photorecallnm.com/uploads/1/3/0/7/130738716/9179093.pdfIn PDF document text
    • http://criminaldefenseattorneycincinnati.com/uploads/1/3/0/9/130969871/4881105.pdfIn PDF document text
    • http://michaelwarrenmurphy.com/uploads/1/3/0/7/130776003/lozuwibub.pdfIn PDF document text
    • http://www.mltransportebasel.ch/uploads/1/3/0/5/130545573/tejina-munevix.pdfIn PDF document text
    • http://jeannettesasscer.com/uploads/1/3/0/9/130969371/kefikazoxibubutuxada.pdfIn PDF document text
    • http://pcbyrd.com/uploads/1/3/0/7/130739368/gotow.pdfIn PDF document text
    • http://joshuamatthewphillips.com/uploads/1/3/0/3/130323789/fa4b8e28a02103a.pdfIn PDF document text
    • http://eyesonyoulimousineservices.com/uploads/1/3/0/4/130483273/zavagi-ruxelam.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F98 8120 bytes
SHA-256: e67cd62f495867163d6b857753249b401de76b4f669c352967e899c378bcabec

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