Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bf1838ba29cda8…

MALICIOUS

PDF

69.9 KB Created: 2021-01-21 12:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1ed42357ba157bde2fbcead847c6f1ef SHA-1: 2101f23d3c68186f85c9c4272274106a41cf17c2 SHA-256: 58bf1838ba29cda8be33dcb340f0a771b211a7dd01815760118a157bd1ec596e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least two identified as malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to direct users to potentially harmful sites. ClamAV detection and ML classification further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=northridge+animal+clinic+reviews In PDF document text
    • https://site-1168163.mozfiles.com/files/1168163/49528280366.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/ghhetkX/trucks_off_road_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/O9cgceR/word_chains_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/dmvighf/meme_soundboard_for_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/ijifQv9/digicel_group_jamaica_address.pdfIn PDF document text
    • https://site-1178650.mozfiles.com/files/1178650/gelurujelaseragariremif.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/zheNXOp/woodworking_bench_adjustable_height.pdfIn PDF document text
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/ligen.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/idjR1hg/46162401386.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/bgfJxg2/34172103239.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/aib1ieK/66227859444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD748 5472 bytes
SHA-256: e36b4840cbedfb2e2ac67972f5ef3633bf7746177948c229f83b3932a1db9753
font_01_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 9796 bytes
SHA-256: 4a2ebc2c04b63c89935e6ee756c26dc281d0dbb06e92f74c3fdd9896bf5ac516

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