Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e7cfe6dfd47785…

MALICIOUS

PDF

45.4 KB Created: 2020-03-16 02:33:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: c0a5c0be94368deecc7e71c30d3996ba SHA-1: 886df05f93330fc10f03c17eec312518e73c6328 SHA-256: f8e7cfe6dfd47785825a6e1424c872c151b748c2f56b8607bf7e25e8a61b447d
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, a technique commonly used for SEO spam or to direct users to malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves luring users to click on numerous external URLs, many of which point to other PDF files.

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://life.mediutopia.com/uploads/1/3/0/4/130483331/130483331.html#western+europe+political+map+answers PDF link annotation
    • http://grisipetcare.com/uploads/1/3/0/4/130435895/5dbf0.pdfIn PDF document text
    • http://cocktailsnponytails.com/uploads/1/3/0/7/130739922/tenixegabajikoxa.pdfIn PDF document text
    • http://escaperoomtysonscorner.com/uploads/1/3/0/6/130640010/dopadinifewokada.pdfIn PDF document text
    • http://metawaygroup.com/uploads/1/3/0/5/130589442/lutixenipi.pdfIn PDF document text
    • http://lordoftheblock.com/uploads/1/3/0/6/130621458/1e533517fa6.pdfIn PDF document text
    • http://dualwayvintage.com/uploads/1/3/0/6/130639862/d1579d9cd45bcce.pdfIn PDF document text
    • http://www.northcountryhomeinspection.com/uploads/1/3/1/0/131070230/525517.pdfIn PDF document text
    • http://theheroinesclub.com/uploads/1/3/0/7/130739680/ximekafofuvu_xizoximeri_vufiruwibir_wibanisova.pdfIn PDF document text
    • http://eliteculinarychef.com/uploads/1/3/0/7/130738499/lafaruvegop.pdfIn PDF document text
    • http://www.mattgougherty.com/uploads/1/3/0/3/130323754/0e9a4.pdfIn PDF document text
    • http://mdcounselingservices.com/uploads/1/3/0/4/130488621/nofudekon_gaxido.pdfIn PDF document text
    • http://ronaldfoster.com/uploads/1/3/0/4/130483540/gokovil_refodoletok.pdfIn PDF document text
    • http://commemorativechoir.com/uploads/1/3/0/5/130588988/boteluragitigenen.pdfIn PDF document text
    • http://www.tibetanbuddhismsatx.com/uploads/1/3/0/7/130775657/jitine_vipibemojug_pazukarogukosad.pdfIn PDF document text
    • http://goodysplumbing.com/uploads/1/3/0/6/130640231/004de85.pdfIn PDF document text
    • http://avdesigns85.com/uploads/1/3/0/4/130476503/jirimuxozarux.pdfIn PDF document text
    • http://she-racreations.com/uploads/1/3/0/7/130738777/cb17c.pdfIn PDF document text
    • http://mastiffroyalty.com/uploads/1/3/0/2/130289279/tajod_pidiguf_savusig_sixon.pdfIn PDF document text
    • http://washingtonstatehealthadvocates.com/uploads/1/3/0/4/130483869/ralibijogose-lolusana-togemabituxofus.pdfIn PDF document text
    • http://koinoniaministryinternational-org.davidmichaeldesigns.com/uploads/1/3/0/6/130603834/3835766.pdfIn PDF document text
    • http://systecaiml.com/uploads/1/3/0/7/130739928/5560918.pdfIn PDF document text
    • http://rucomingout.com/uploads/1/3/0/5/130551309/9857621.pdfIn PDF document text
    • http://xpspayroll.com/uploads/1/3/0/4/130436020/e77821b0.pdfIn PDF document text
    • http://superspysaucecompany.com/uploads/1/3/0/2/130289232/e5a8a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 7896 bytes
SHA-256: 814d0e8a0fe5a53efcd9c246c7be06c5e21b62a931af7f783ea0f19d7dc55729
font_01_sfnt_off00008feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEB 16388 bytes
SHA-256: ff27d99f049fa5ec83b4c3710afe1f9aee00eb20942a9349d435d4ca5ad10f97

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