Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bcc331dc88924d…

MALICIOUS

PDF

83.8 KB Created: 2021-03-14 07:03:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2513c57d70df92882bbe2ca4211700f0 SHA-1: 0df1a2818f767be19bc5d9093ab3f0e18411cf90 SHA-256: e6bcc331dc88924d995c52ae375fe514ae8297e782e1bf0b863130e3215045c8
136 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. A heuristic identified an image lure linking to an SEO redirector, which resolves to the URL 'https://zajinet.ru/strik?utm_term=go+where+you+feel+most+alive+quotes'. This URL is likely part of a phishing campaign or a download lure. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/strik?utm_term=go+where+you+feel+most+alive+quotes PDF link annotation
    • http://bivadula.22web.org/gesejufoxovub.pdfIn PDF document text
    • http://febugidomoxasez.22web.org/96754386378.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/mopumemitofapisoz.pdfIn PDF document text
    • https://bovojopo.weebly.com/uploads/1/3/2/3/132302970/fugoladebipewa-difefopemukudi-xinafizun-debodugikedawut.pdfIn PDF document text
    • https://ninuxegomozul.weebly.com/uploads/1/3/1/8/131871835/5cd2957e7bb191.pdfIn PDF document text
    • http://todurodadol.iblogger.org/19562585155.pdfIn PDF document text
    • http://xujofalidubof.iblogger.org/digital_communications_manager_jobs_london.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9b580eec-81cc-4fef-b7a3-0461cc592d86/what_is_the_life_events_stress_scale.pdfIn PDF document text
    • http://wererivukij.epizy.com/medical_surgical_nursing_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/naweve.pdfIn PDF document text
    • http://fuzulaj.rf.gd/kegonekikizipopukumijogi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/83760907363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c4643c-2681-416d-bcf9-d02751f166be/73837814317.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_fd7bc78714374f0fa956ec0a9204e8f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd957bed-ab87-4733-a1ef-e868237962d7/fallout_4_map_settlement_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/interest_groups_icivics_answers_the_potato_problem.pdfIn PDF document text
    • http://petenufafevut.rf.gd/zogodepovekugoreguriz.pdfIn PDF document text
    • http://vujapaporetakik.epizy.com/amy_tan_mother_tongue_published.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_1b9205df82ad44589649904b1ebb9ea5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/how_to_write_better_sentence_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/62709030874.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 5192 bytes
SHA-256: 645387c8f3a46de785a4d8ea63d64097be78375bdaf80ebcddc9d893be0c4316
font_01_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 11024 bytes
SHA-256: f4942c65c3344a1c7f3d84e2b43f4b2f73f2ce43b81a3bce63eb87f2c495d3fc
font_02_sfnt_off00013406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13406 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333