Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b85667aa1aa1bd0…

MALICIOUS

PDF

40.0 KB Created: 2020-03-30 02:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 0273ece65ef366c1f430f2c955bad362 SHA-1: aceadc48df0054d68ade6b8a67fe7cb147ba1b08 SHA-256: 9b85667aa1aa1bd08e30aadc6ebd85d9cf9868585cbd87caaf2b894f5d66e1b1
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body contains the phrase 'Operaciones mentales definicion', which appears to be a lure. The primary function of this document is to act as a link farm, likely to manipulate search engine results or to distribute further malicious content through the linked PDFs.

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://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/5/130551823/130551823.html#operaciones+mentales+definicion PDF link annotation
    • http://lens360media.com/uploads/1/3/0/6/130620424/pogilajugim_zajesaradimofo_gefisiri_burodoki.pdfIn PDF document text
    • http://bpwcontinuingeducation.com/uploads/1/3/1/1/131163777/2535639.pdfIn PDF document text
    • http://thehopepartners.org/uploads/1/3/0/7/130739247/83bc75033a.pdfIn PDF document text
    • http://mosestuki.com/uploads/1/3/0/5/130590463/34615b35086.pdfIn PDF document text
    • http://stephensayegh.com/uploads/1/3/0/9/130969851/kulewigewesir.pdfIn PDF document text
    • http://cdksockgang.com/uploads/1/3/0/6/130621299/22ecf3b525d7c59.pdfIn PDF document text
    • http://maxgirouxpro.org/uploads/1/3/0/4/130483303/ronexukezosa_xegodu_jeduvazoxivusin_zuror.pdfIn PDF document text
    • http://truegift.us/uploads/1/3/1/1/131164234/sufon_josez_faridizefij_wanirod.pdfIn PDF document text
    • http://ppas2020.com/uploads/1/3/0/2/130274378/f81689b5b12b5a.pdfIn PDF document text
    • http://grillhousebrand.com/uploads/1/3/0/8/130814338/1656582.pdfIn PDF document text
    • http://topguntattooing.studio/uploads/1/3/0/6/130639437/466583d616b948.pdfIn PDF document text
    • http://sunflowerandwillowsco.com/uploads/1/3/0/9/130969515/zewidopaliw-fuvitomixetivuf.pdfIn PDF document text
    • http://evie-love.com/uploads/1/3/0/6/130639465/9312815.pdfIn PDF document text
    • http://flanagansbeerfest.com/uploads/1/3/0/6/130604434/530f47.pdfIn PDF document text
    • http://heartsinhandchildevelopmentcenter.com/uploads/1/3/0/8/130814513/meluburikakide.pdfIn PDF document text
    • http://taxfirmsolutions.com/uploads/1/3/0/4/130490117/ba281737284d09.pdfIn PDF document text
    • http://sacramentoyardcare.com/uploads/1/3/0/3/130379365/vowiri.pdfIn PDF document text
    • http://silviomaestrelli.com/uploads/1/3/0/8/130814430/ec886be63.pdfIn PDF document text
    • http://savis-inc.com/uploads/1/3/1/1/131163976/naliwi_tafavugab_foridiri.pdfIn PDF document text
    • http://konceptdev.net/uploads/1/3/1/0/131070313/3519797.pdfIn PDF document text
    • http://amandasdigitalbinder.com/uploads/1/3/1/1/131164112/japokikogefelove.pdfIn PDF document text
    • http://chickenindex.com/uploads/1/3/0/7/130738722/kebekanobexesimabix.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
🗂 Part of campaign: amandasdigitalbinder.com 4 samples

Related samples 2

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_off000071cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CC 8612 bytes
SHA-256: 4c6fc1a04f2e1d255ae91abcfe742e23a12f0688aebcb25156680c99cde7b5c7

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