Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01185cd3f54d286…

MALICIOUS

PDF

44.4 KB Created: 2020-03-29 06:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f5cc2911c14aa41ecef37f0f4f6a21e SHA-1: e88f90c7ccfbe3acf9e2894dcbf948917355216c SHA-256: a01185cd3f54d28633d6f55bf2bfa7a446582b2447af522af2b4d8d4a34c2909
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF SEO link farm. The primary URL points to an HTML file containing the phrase 'the isis papers review', suggesting a potential lure. The ML classifier strongly flagged this PDF as malicious. The extensive link farm indicates an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://74-123-76-231.mgwnet.com/uploads/1/3/0/5/130590373/130590373.html#the+isis+papers+review
    • http://dancinglotus.org/uploads/1/3/0/7/130775786/lajivafepozimaf-sojose.pdf
    • http://nordicswimming.org/uploads/1/3/0/6/130605019/tixisasegenol.pdf
    • http://kenmare-bayview-house.com/uploads/1/3/0/5/130550936/nerupomi.pdf
    • http://lovemassageuk.com/uploads/1/3/0/5/130589429/waxug.pdf
    • http://restorationproductions.com/uploads/1/3/0/5/130539849/nupokipukesalole.pdf
    • http://northidahostrainedhorses.com/uploads/1/3/0/6/130621439/8df21b0f0.pdf
    • http://wbwwboutiquew.com/uploads/1/3/0/7/130775465/vozin-lazelurim-telidoxaximijab-livupevezaz.pdf
    • http://greenfireaz.com/uploads/1/3/0/2/130274024/nenewodoluxiga.pdf
    • http://dc-a61ca1f11fd7.theboutiqueoz.com/uploads/1/3/0/7/130776828/ae0ce549d.pdf
    • http://citizensfirstfinancialgroup.com/uploads/1/3/0/4/130477234/6fd661ca.pdf
    • http://sosmexmaquinados.com/uploads/1/3/0/2/130272420/tunetusamejutalizaji.pdf
    • http://www.myftech.com/uploads/1/3/0/6/130639665/bodise-folubezelaw-zubatew.pdf
    • http://danielsperoni.com/uploads/1/3/0/4/130476378/zefutarizazek-divosivulafow.pdf
    • http://good-doggo.net/uploads/1/3/0/5/130550666/likigudesugev-sixuru-gilifo.pdf
    • http://zagreb-experience-tours.com/uploads/1/3/0/5/130588594/xovemuru.pdf
    • http://sciencewithheart.shop/uploads/1/3/0/7/130738568/bakakiduguji.pdf
    • http://garagedoor-repair-chino-ca.com/uploads/1/3/1/3/131398372/4712961.pdf
    • http://7soundenergy.com/uploads/1/3/0/6/130620486/f54bb4c2.pdf
    • http://www.nobleberean.com/uploads/1/3/0/7/130775278/wotiju.pdf
    • http://www.1000islandspaddling.com/uploads/1/3/0/4/130483550/1329325.pdf
    • http://lauramugridgedoula.com/uploads/1/3/0/6/130639611/1770382.pdf
    • http://www.thisishowtowork.com/uploads/1/3/0/4/130488699/nulazazulajuzemejog.pdf
    • http://www.atp-pro.com/uploads/1/3/0/6/130621059/jafupidiju_sefeninepat.pdf
    • http://www.atp-pro.com/uploads/1/3/0/6/130621059/jafupidiju_sef
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085cd.bin
b57dd11dd8b411ec40df85b001b43f301c533a2e0eb2493cb7ef83e11d89e607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 7900 bytes

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