Malicious PDF — malware analysis report

Static analysis result for SHA-256 747886f5b10ea2c1…

MALICIOUS

PDF

70.1 KB Created: 2021-03-19 23:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df884275aa2136a6771fd5ec9856cd8f SHA-1: 93ecad0266822ee29eeb08b85ebed0565e8158c8 SHA-256: 747886f5b10ea2c15e3acf6b5d4ca94eba73b38b310b59978014ea6aafa99bc7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings reveal a significant number of external links, suggesting a link farm or phishing operation. The document body, though truncated, contains keywords like "Ph worksheet key" which, combined with the numerous embedded URLs, points towards a lure for users to visit potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://golowaki.ru/wix?keyword=ph+worksheet+key
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/ketewunidefu.pdf
    • http://mofobawosenej.mygamesonline.org/simplifying_algebraic_expressions_with_exponents_worksheets.pdf
    • http://zasufigonibat.getenjoyment.net/bumoseda.pdf
    • https://zefulesemed.weebly.com/uploads/1/3/6/0/136021217/2a0bbc.pdf
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/7034e2a.pdf
    • http://pagavopalubutu.scienceontheweb.net/75470848744.pdf
    • https://cdn-cms.f-static.net/uploads/4393180/normal_60401eb69b0a3.pdf
    • https://cdn.sqhk.co/tenokesime/himkhhl/rusinedut.pdf
    • https://cdn.sqhk.co/gorokipo/ibiggis/fudotatodewowukodugijawas.pdf
    • http://kuvenumine.mygamesonline.org/doxakemarixufinalik.pdf
    • https://cdn.sqhk.co/neratimo/XjctMje/vozakatuvag.pdf
    • https://cdn.sqhk.co/dugelabomaw/q3wjcpk/house_music_radio_stations_nyc.pdf
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/rawofin-guvom.pdf
    • https://cdn.sqhk.co/moxinivo/Ggiifia/68055758078.pdf
    • https://cdn.sqhk.co/sejarepezibo/gjcQiek/murder_hornets_june_2020.pdf
    • https://cdn.sqhk.co/minutakumu/Sihgdhc/miss_sloane_parents_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4485436/normal_60481ae2265c6.pdf
    • https://cdn.sqhk.co/nazabimon/iheLLhj/4016716903.pdf
    • https://lanufirosonez.weebly.com/uploads/1/3/4/7/134704233/7d8d6a045c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://magegefopo.atwebpages.com/26422597153.pdf
    • http://womawujun.atwebpages.com/95634730396.pdf
    • http://sanugifop.atwebpages.com/xasevuxakan.pdf
    • http://jelomasulavi.atwebpages.com/gedegefaluposubefagef.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46e.bin
f31379c510b21150be0a899f5c303b3f3bf93b3d172cada8a4f940ee1ef5f0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 4792 bytes
font_01_sfnt_off0000e4cb.bin
374d392ff1b83eecea97d5ab4162fb1ade95b53b30b02df4ea59fbb3a5a47ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 10832 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.