Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c163e2bc5dad6d5…

MALICIOUS

PDF

86.9 KB Created: 2021-03-28 21:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6dbda72902a4acc5d7313cf6d2c560d9 SHA-1: 69726f7ce46517a459edd3b08f553c5445f4c784 SHA-256: 0c163e2bc5dad6d5e0246df23d2b2a6a53905f27276b9c714e9f25086d36fd1e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The document body, though heavily obfuscated, contains text related to a Netflix movie, suggesting a lure. The presence of ClamAV detection and an ML classifier flagging the PDF as malicious further supports its malicious nature. The primary attack pattern involves directing users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://gimoguvi.ru/strik?utm_term=el+simbolo+perdido+pelicula+netflix PDF link annotation
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/pelul.pdfIn PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/1a2b48a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_605ff6ddd2d2a.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/264698.pdfIn PDF document text
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/puviminevi.pdfIn PDF document text
    • http://zekamuwafevero.iblogger.org/detomoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_6035624e20111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_60352b01e6dcd.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/gexed_vewujad_dinusoze_xajavuwanejow.pdfIn PDF document text
    • http://vosalax.22web.org/rise_of_the_guardians_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fdc29de7b813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_5fe45b9a19e7d.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/84f14c53-dc51-4ddc-8229-1b7a85931be6/43134814919.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/50925760424.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/64802095117.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/why_is_my_ge_washer_not_agitating.pdfIn PDF document text
    • http://popirarubinuluk.rf.gd/metastatic_melanoma_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/hard_phrases_in_spanish.pdfIn PDF document text
    • http://vebilotavofako.rf.gd/wafilitijibifijapam.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/voberawibogodi.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/33046497779.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/bsccp_guideline_20.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/languedoc_2017_vintage_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fd2d6f-9ec4-435d-bb97-21271def5eb2/how_to_reset_a_dometic_rv_fridge.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/what_are_the_five_information_sensory_receptors.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/before_midnight_movie_hdpopcorns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2490f1-f3c8-45c8-8e79-a2073a95ef9d/pretty_little_liars_season_7_episode_20_cast.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off00011347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11347 5464 bytes
SHA-256: a11c9664acd7527ccf99896e6dcb221555deb2e7896a80d0f4a387fba5af66a2
font_01_sfnt_off000125c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C7 12268 bytes
SHA-256: 5310afceac1c9501565dc2f053f8a6b0da5baa57460fd37f2a876b605a48e90d