Malicious PDF — malware analysis report

Static analysis result for SHA-256 742a31d52c9885ba…

MALICIOUS

PDF

111.0 KB Created: 2021-03-04 23:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 27b4d33702e3673a0545f237751f5478 SHA-1: 4970c579c55e913baf7be177d15330f9e1ad510d SHA-256: 742a31d52c9885ba8b05fcb344e5193dee739b94f45337685339ff60be20126e
124 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically appearing to be a search result lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9320

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://zajinet.ru/award?keyword=when+did+the+dyson+dc35+come+out PDF link annotation
    • https://rasajelisulozin.weebly.com/uploads/1/3/1/6/131637016/a5c85adc9.pdfIn PDF document text
    • http://sowemuperiz.22web.org/linuliromalaka.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/1403816.pdfIn PDF document text
    • http://hookup754.fun/learn_to_sing_in_tune_online_free0m0cu.pdfIn PDF document text
    • http://reznitskygallery.com/936221193551sm9a.pdfIn PDF document text
    • https://palotuzumi.weebly.com/uploads/1/3/5/9/135991270/fc24afb42e8.pdfIn PDF document text
    • http://ita-bio.space/rise_up_andra_day_lyrics_translationfg5li.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/fuwazose.pdfIn PDF document text
    • http://wegisinebirixe.iblogger.org/delinimusivosobudosex.pdfIn PDF document text
    • http://wavakuxakuxom.66ghz.com/nct_cherry_bomb_song_ilkpop.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/7364062.pdfIn PDF document text
    • http://shoop-ft.ru/lasamipimijomokitezulszrfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9845faed-6a2f-4a03-8210-05ff3083977d/how_to_add_website_to_wix_blog.pdfIn PDF document text
    • http://bopudax.epizy.com/love_animated_gifs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05dbc521-fd8d-4b79-86d1-93d0ee8539bc/referenceerror_request_is_not_defined_javascript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e5a199-44ea-47e2-8caf-9a2073855907/wofilirilebipenezaw.pdfIn PDF document text
    • http://tuzipani.rf.gd/tavumewerexurowiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4749ff2d-ab09-4e7f-bdad-6354e8665c78/woredif.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_33854e4010eb470695068c6740daad3e.pdf?index=trueIn PDF document text
    • http://beverunogi.rf.gd/la_la_land_cello_sheet_music.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_e05b539b00c342a9ae2c100164f2520e.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001871f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1871F 5244 bytes
SHA-256: 96be91f12c92a97170a1745f2e800cee30cfb3f9251bfaf9bcc28dd5ed4cde11
font_01_sfnt_off000198f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198F0 10840 bytes
SHA-256: 68d5506db97fe6b1a27544cade0835795f9bcc4dd757062649689762953f8c8c

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