Malicious PDF — malware analysis report

Static analysis result for SHA-256 7378c4a9a5e033c4…

MALICIOUS

PDF

46.4 KB Created: 2020-05-14 14:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 87e4a4a29406082d7a3ce7f2f2d3e805 SHA-1: 6a6ae4d362ddc52090c43f8e703787bdeacb496c SHA-256: 7378c4a9a5e033c428b59671412bfd7f67f4964a7adcacc9f28ce4d249726326
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ML classifier strongly indicated maliciousness. The embedded URL points to a page that appears to be a lure, likely intended to redirect the user to further malicious content or phishing pages.

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://ivorywheel.com/uploads/1/3/1/4/131454222/131454222.html#audit+report+format+for+society+2018
    • http://hbtechnicalservices.net/uploads/1/3/0/6/130604631/5e49457660a78.pdf
    • http://partingwatersband.com/uploads/1/3/1/4/131453595/rukowikum.pdf
    • http://sterilecarelab.com/uploads/1/3/0/9/130969458/6570295.pdf
    • http://babymarinade.com/uploads/1/3/1/3/131384721/115846c.pdf
    • http://un-mariage-a-la-reunion.fr/uploads/1/3/0/2/130289577/fovavovedagutadiwa.pdf
    • http://ambiencecleaningaustralia.com/uploads/1/3/1/3/131382673/jevonewe.pdf
    • http://englishbyrebecca.com/uploads/1/3/0/5/130589054/1248872.pdf
    • http://forgecottagepottery.com/uploads/1/3/0/5/130547207/kuwotanoz_telekawa.pdf
    • http://beautifulgateinternational.org/uploads/1/3/0/4/130476541/mafesekoj.pdf
    • http://weddingdressnewhampshire.com/uploads/1/3/0/7/130776421/tirexa.pdf
    • http://mayamontoya.com/uploads/1/3/0/7/130776616/butid_pifupelebuzu_kekuparuwiwagim.pdf
    • http://brizcrete.com/uploads/1/3/1/4/131438067/jopix-bamafabelesex.pdf
    • http://hmfirewood.com/uploads/1/3/1/8/131856173/b9c5be5609a36f0.pdf
    • http://delightfullighting.com/uploads/1/3/0/6/130622091/denobe-vulixome.pdf
    • http://fathommaritimeintelligence.com/uploads/1/3/1/4/131438180/01e35c82901ee.pdf
    • http://bonnouvell.com/uploads/1/3/0/5/130539944/zawenozixetijedo.pdf
    • http://melrosebootcamp.com/uploads/1/3/0/6/130639668/8275457.pdf
    • http://jet-connections.com/uploads/1/3/1/4/131437490/gokituleravam_relaremom_pegojaxupuk.pdf
    • http://reelshape.com/uploads/1/3/1/4/131406303/xejegelitivu_solisezig_mosidewunedas_wikimojiraridu.pdf
    • http://gmfarmingagriculturellc.com/uploads/1/3/0/5/130540246/xudosum-fivaf-xizibekiwe-nikajago.pdf
    • http://domoreentertainment.com/uploads/1/3/0/8/130874370/biwapuz-dijuvizemizu-xuropufamakak.pdf
    • http://tricotchien.com/uploads/1/3/0/5/130539926/2c5d6d376a192c0.pdf
    • http://pacificrimae.com/uploads/1/3/0/6/130640145/2781023.pdf
    • http://romanticcowgirllingerie.com/uploads/1/3/0/4/130483756/8768919.pdf
    • http://alchemicaleducation.com/uploads/1/3/1/3/131379060/suxisupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008924.bin
b3a5adc5027933795eb43e0434f08d994015766122d8ed75f9b4cc2b4d49ed1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8924 10520 bytes

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