Malicious PDF — malware analysis report

Static analysis result for SHA-256 812a8051875580ad…

MALICIOUS

PDF

44.6 KB Created: 2020-03-10 07:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 57089b2aaf2c3a999250032cee1747c5 SHA-1: 7717241617fea96205e3cb6b821fd80feabfec71 SHA-256: 812a8051875580ad7c7dab8fa08771b258e6975efd9e251d10e8a5a34e15793d
116 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of SEO spam or a link farm, containing a large number of external links. The 'SE_CALLBACK_LURE' heuristic suggests a potential phishing or tech-support scam pretext, aiming to trick users into interacting with the embedded links or potentially calling a number. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points towards a malicious intent to redirect users to potentially harmful sites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://radiocuibullupiloralbi.org/uploads/1/3/0/2/130270872/130270872.html#acca+f6+exam
    • http://jenniferstefanac.org/uploads/1/3/0/7/130775545/nizibuzajapil.pdf
    • http://cecvcapacitacionvial.com/uploads/1/3/0/3/130379769/tapolemiteju.pdf
    • http://www.grump-fun.org.uk/uploads/1/3/0/8/130815031/tugabitexoporopus.pdf
    • http://www.beautybeauspa.com/uploads/1/3/0/7/130776123/3560751.pdf
    • http://www.stoneleather.com/uploads/1/3/0/3/130313613/barib-komozid.pdf
    • http://accessoclienti39.com/uploads/1/3/0/4/130490808/jovudo.pdf
    • http://yessicafandinofiore.com/uploads/1/3/0/8/130814337/bifuzit-tapuk.pdf
    • http://aerialprotectivesolutions.com/uploads/1/3/0/5/130589165/doxosot.pdf
    • http://ethanseelig.com/uploads/1/3/0/6/130620370/7330598.pdf
    • http://emperience.org/uploads/1/3/0/2/130287919/7080473.pdf
    • http://lisathomas-designs.com/uploads/1/3/0/7/130776630/vizez.pdf
    • http://warwickcarriagedriving.com/uploads/1/3/0/2/130289353/fowotozixabi.pdf
    • http://barefootlaneclothing.com/uploads/1/3/0/7/130775386/pogafize-tirirusilimova-vawaga-jezolekobo.pdf
    • http://jinbaobobeiyongwangzhiyoujige.f18.ebkf.org/uploads/1/3/0/7/130738835/7425a24.pdf
    • http://techie-designs.com/uploads/1/3/0/6/130604805/milemilewag.pdf
    • http://futureforwardholdings.com/uploads/1/3/0/6/130639178/a7f1bfe8f3afb.pdf
    • http://metuljcki.com/uploads/1/3/0/2/130270793/bitigerivu-berezofag.pdf
    • http://threefoolscoffee.com/uploads/1/3/0/6/130622076/993979.pdf
    • http://cameronjohnsonphoto.com/uploads/1/3/0/7/130739153/jebedosovijufitunuw.pdf
    • http://sandgsolutions.com/uploads/1/3/0/7/130776246/muzudad_tiresojikim_sagipejeri_nubodimazudis.pdf
    • 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_off0000861d.bin
288b3be26c8435451752004330089ffb38205249756352bc48d8e3ef45cea7e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861D 8024 bytes

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