Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba91a9396d38e09…

MALICIOUS

PDF

60.0 KB Created: 2020-12-09 11:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 05c7e05076d2cca8c9f684b561d35165 SHA-1: 82eb45f26c5361ac727dfd00ee781a205012d20b SHA-256: 8ba91a9396d38e091a1f0d7e72309bbb157db570fb546f6f62dd6e81753ba937
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While the document body is heavily obfuscated, the presence of links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=petsafe+remote+trainer+manual In PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/a6a7213.pdfIn PDF document text
    • https://titobuvidotid.weebly.com/uploads/1/3/4/5/134598786/jopuvukoditiz-pozedafogax-tifubek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f925fa2ec55d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jobavo/bhakti_bhojpuri_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db73c7bc-5309-4e20-bac8-b5adc5f8b57c/wesoxasokakodevijazo.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/savoleselixot.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/zumam.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/federal_supreme_court_cassation_decisions_volume_18.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c3fc3dfdd95b60db3ffd/t/5fc7e620e47f8a709986047d/1606936096437/sunudedojuduvuzurejewaze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce34e9790d063a90a99d52/t/5fd07dac89fd2c07d104688c/1607499180740/98423642389.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfbf229c5e2669025e0d7/1606220790509/how_does_it_feel_to_be_a_problem_moustafa_bayoumi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d9a3fa9ecc39789baefb/t/5fce2b54cded405bb8021f15/1607347029567/dudifasufimerinozotanalor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14640df132613bbc04837/t/5fc534af3c6ccf69f307a240/1606759602104/57249227897.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/rscit_2018_answer_key.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_off0000b2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C5 4916 bytes
SHA-256: 9222e3c2d41ee9bb66d1b911eac329c188c6db63cd77c1086862e4a3dd22472f
font_01_sfnt_off0000c367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC367 9292 bytes
SHA-256: f51b66a2ab7976de9f66cf8605e0110e4dd43ea3c203cb69185f504d983dc271

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