Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2956d97efbe457…

MALICIOUS

PDF

39.9 KB Created: 2020-03-23 15:10:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 3b75a6baaa2d47a55fa989500b655e3b SHA-1: 4aec9ebba963462e7f117b64e09e192d7e5bbcb0 SHA-256: 1e2956d97efbe457b26ca7e3f529bdd480075d010def6c8c39cbf76c1941160d
136 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Nursing diagnosis for stress urinary incontinence' and metadata indicating it was generated by wkhtmltopdf. This suggests a lure to a large number of unrelated websites, likely for SEO manipulation or to serve as a distribution point for 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://kelbels.org/uploads/1/3/0/6/130620327/130620327.html#nursing+diagnosis+for+stress+urinary+incontinence PDF link annotation
    • http://buromatsa.ch/uploads/1/3/0/7/130739227/muves_raneje_xovos_buronefoki.pdfIn PDF document text
    • http://coffebreak.org/uploads/1/3/0/5/130551126/7350494.pdfIn PDF document text
    • http://reddresssociety.net/uploads/1/3/0/2/130289433/e001a8251da.pdfIn PDF document text
    • http://sarahpottier-dieteticienne.com/uploads/1/3/0/4/130436390/8534316.pdfIn PDF document text
    • http://rapidetravels.org/uploads/1/3/0/6/130621210/434933.pdfIn PDF document text
    • http://www.sts-secure.com/uploads/1/3/0/4/130483631/3309819.pdfIn PDF document text
    • http://vitality-mens-health.com/uploads/1/3/0/4/130435670/damowofafo_xoluxu_kirexuve_linawefe.pdfIn PDF document text
    • http://southernhealthandwellness.com/uploads/1/3/1/0/131070754/24284.pdfIn PDF document text
    • http://cakesbytaste.net/uploads/1/3/0/5/130552016/7df0084f7a29e.pdfIn PDF document text
    • http://www.sascschools.com/uploads/1/3/0/5/130590458/9895225.pdfIn PDF document text
    • http://newlifeh20.com/uploads/1/3/0/9/130969852/pijivizimug_vanazit.pdfIn PDF document text
    • http://www.naomilobley.co.uk/uploads/1/3/0/2/130289236/xorididalat.pdfIn PDF document text
    • http://www.beccaimage.com/uploads/1/3/0/5/130542770/xedumagodetutunurowe.pdfIn PDF document text
    • http://thecoinmint.com/uploads/1/3/0/5/130588821/mexujodeg.pdfIn PDF document text
    • http://rebeccasiswick.com/uploads/1/3/0/7/130739885/163464.pdfIn PDF document text
    • http://theorlandorealtor.com/uploads/1/3/0/5/130551589/zurojiloxalexi.pdfIn PDF document text
    • http://northpacifictrainingperformanceinc.com/uploads/1/3/0/8/130814021/duvatitilopezosufoxo.pdfIn PDF document text
    • http://jamessidell.com/uploads/1/3/0/4/130435556/zebulurodiginobisuz.pdfIn PDF document text
    • http://de.toukam-translations.com/uploads/1/3/0/2/130291536/nanez.pdfIn PDF document text
    • http://nerdherdsocial.com/uploads/1/3/0/5/130546136/xaxebegakanipe.pdfIn PDF document text
    • http://buildmywinecellar.com/uploads/1/3/0/7/130740184/waredig.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_off0000740f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740F 7040 bytes
SHA-256: 4ff745d09fa63ac3dae6c697aab3fc550fe21360e8ac2a444d3ee29d8879950c

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