Malicious PDF — malware analysis report

Static analysis result for SHA-256 430157ae9b08261e…

MALICIOUS

PDF

42.2 KB Created: 2020-03-23 07:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 4235e70c8d580dc0a4517c74596ff2aa SHA-1: bf59fa2292e9ab4890844d4c95cd61623bd938aa SHA-256: 430157ae9b08261e27a59cb7a7a71034546be6966027521534fadd72288d602b
136 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links pointing to various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates that this is a link farm, suggesting the primary purpose is to drive traffic to these external resources. The document body, though malformed, contains a URL that aligns with the detected link farm behavior. No scripts were extracted from this sample.

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://cma458.com/uploads/1/3/0/5/130589202/130589202.html#nursing+diagnosis+for+severe+diarrhea PDF link annotation
    • http://epicvegasadventuretours.com/uploads/1/3/0/5/130588205/tuvareli.pdfIn PDF document text
    • http://rasconsultingfirm.com/uploads/1/3/0/6/130603955/bimutipigabix.pdfIn PDF document text
    • http://pepperkornet.no/uploads/1/3/0/4/130489398/najopolilibifefon.pdfIn PDF document text
    • http://byshannonmalone.com/uploads/1/3/0/2/130274151/limebimit-fowumirezazube.pdfIn PDF document text
    • http://gatheringnations.org/uploads/1/3/0/4/130436298/difawogofijula_gumiwibe.pdfIn PDF document text
    • http://calldavid.com/uploads/1/3/0/7/130739570/gulararitowo.pdfIn PDF document text
    • http://paravelfilms.com/uploads/1/3/0/2/130291827/wugavam.pdfIn PDF document text
    • http://laurendanhof.com/uploads/1/3/0/2/130289428/4731852.pdfIn PDF document text
    • http://astrologyandcrystallighttherapy.com/uploads/1/3/0/6/130620716/b939479ebaf.pdfIn PDF document text
    • http://ipodchurch.com/uploads/1/3/0/9/130969406/8660eafbf57.pdfIn PDF document text
    • http://derjusa.com/uploads/1/3/0/6/130620788/1baece9b3f448b.pdfIn PDF document text
    • http://tmgorgeous.com/uploads/1/3/0/5/130543784/67740294691.pdfIn PDF document text
    • http://completecarechiropractictables.com/uploads/1/3/0/3/130312920/luvakasevidoput_nodinokip_fepidowofij.pdfIn PDF document text
    • http://jayakartabali.com/uploads/1/3/0/8/130874678/5bc6868c8c60.pdfIn PDF document text
    • http://healthidea4u.com/uploads/1/3/0/7/130739308/b03c716aea.pdfIn PDF document text
    • http://www.ronwaltonactor.com/uploads/1/3/0/6/130621523/pemalexonaj-zibuzorop-juviromafodoso-motodazifivide.pdfIn PDF document text
    • http://www.my-auto-max.com/uploads/1/3/0/8/130873997/xikuda_fomubimilek_jalorisobano_nopaw.pdfIn PDF document text
    • http://cadencehealth.co.uk/uploads/1/3/0/8/130873867/301c928d12fb7a2.pdfIn PDF document text
    • http://thekookas.com/uploads/1/3/0/6/130639583/1159252.pdfIn PDF document text
    • http://www.jcquenguan.pixel30.com/uploads/1/3/0/8/130814674/paleluvasumekakorir.pdfIn PDF document text
    • http://hostmaster.stylisteschantaljette.com/uploads/1/3/0/5/130543133/5297625.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_off00007e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E05 7540 bytes
SHA-256: c6f7990a1ff16feed8a751a077cb1cd6d2c04dd947346c991e4e12329dab1386

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