Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1f665554eec140…

MALICIOUS

PDF

48.4 KB Created: 2020-03-31 12:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 9550489dba529a6d53867ad0f19afd8d SHA-1: fe0b35a6f55a2d95036c71d6529b36a56af11c2f SHA-256: 3b1f665554eec140958013dab3548805a375029ce3eeab6b21c8f67d68184fd4
136 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents on different domains. The document body text, though partially corrupted, includes some of these URLs. This behavior suggests the file is part of a link farm designed to manipulate search engine results or distribute content from numerous external sources.

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://federalsafetyconsultingservices.com/uploads/1/3/0/6/130603683/130603683.html#dios+cronos+padre+de+zeus PDF link annotation
    • http://poolsleak.net/uploads/1/3/0/5/130590163/4342bb37df.pdfIn PDF document text
    • http://simplyuniquesboutique.com/uploads/1/3/0/5/130589102/vetodur_topazemogujaj_sevupuvadidozu_xokabaxi.pdfIn PDF document text
    • http://adonaisgoldendoodles.com/uploads/1/3/0/6/130604653/36cac90.pdfIn PDF document text
    • http://industrialbusinessmexico.com/uploads/1/3/0/6/130639699/7289993.pdfIn PDF document text
    • http://cpanel.subudbooks.com/uploads/1/3/0/7/130739315/xepusakajik.pdfIn PDF document text
    • http://indierockgear.net/uploads/1/3/0/3/130323199/e91b0.pdfIn PDF document text
    • http://balinanotech.com/uploads/1/3/0/8/130814030/vurisuwevazoj.pdfIn PDF document text
    • http://matzsoccer.com/uploads/1/3/0/6/130604313/sozifup.pdfIn PDF document text
    • http://katiedaisyboutique.com/uploads/1/3/0/8/130813606/kadazesase.pdfIn PDF document text
    • http://amvadvies.com/uploads/1/3/0/8/130814921/450b03f631.pdfIn PDF document text
    • http://livefitterlivebetter.com/uploads/1/3/0/4/130488100/juvaxugimud.pdfIn PDF document text
    • http://blueflamesphynx.com/uploads/1/3/0/5/130589279/7337964.pdfIn PDF document text
    • http://andtheblackfeathers.com/uploads/1/3/0/5/130551994/5de23068e6b5385.pdfIn PDF document text
    • http://racomi.com/uploads/1/3/0/8/130813888/zomomividixu_mazonopagabawaz.pdfIn PDF document text
    • http://hollyknoxrhame.com/uploads/1/3/0/5/130546024/lolemusumamalisori.pdfIn PDF document text
    • http://mccormickqwik.com/uploads/1/3/0/6/130604595/1008740.pdfIn PDF document text
    • http://rollershadeiq.com/uploads/1/3/0/7/130740618/e6b60.pdfIn PDF document text
    • http://amandalpitts.com/uploads/1/3/0/2/130289663/2af39f397ec32f5.pdfIn PDF document text
    • http://aclaundry.com/uploads/1/3/0/8/130814143/05d6d8c466a.pdfIn PDF document text
    • http://bess-hudson.com/uploads/1/3/0/6/130639954/mupuvakirodapiwete.pdfIn PDF document text
    • http://365biztransform.com/uploads/1/3/0/6/130620881/431767457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000712b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 8780 bytes
SHA-256: 5614bab1329d72c0636f34d813a7e5ff521031c05656e1ebcd2f67fe3613e0e1
font_01_sfnt_off0000913a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913A 3092 bytes
SHA-256: 6f21fc8ee677d709726e6d064407d56866956a758a791bbee757be7f6bf96a08
font_02_sfnt_off00009c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C12 16232 bytes
SHA-256: a6d7ecc0c704b1c0fe1ae26eacfb7b2b424273c076761d665e623b4216455af5

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