Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd01f67c83979d26…

MALICIOUS

PDF

81.0 KB Created: 2021-03-04 16:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 64c0247e8153e0617ed681673eb6968c SHA-1: f15de625d783c581bbb7a9d0549f5ba8ab3030a5 SHA-256: fd01f67c83979d26eb555ab842b5d836cbfd5bcb45967a8d5b98f7ec3d546d42
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document body, though partially corrupted, mentions 'Smith's 3 in 1 knife sharpener instructions', likely a lure to disguise the malicious activity.

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
  • 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://bologen.ru/strik?utm_term=smith%2527s+3+in+1+knife+sharpener+instructions PDF link annotation
    • http://sunipemumax.66ghz.com/handwriting_worksheet_cursive.pdfIn PDF document text
    • http://vonowaz.iblogger.org/xivijogazasepav.pdfIn PDF document text
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/vamigurelenix-goguza-zivinedu.pdfIn PDF document text
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/5128790.pdfIn PDF document text
    • https://bizutimuja.weebly.com/uploads/1/3/3/9/133999747/84ee8df.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/zetubakuz/gusaku.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_27eb8131c7c24aa0885a90174995abc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/76749730738.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_292db4cf7c8341bd8b8fa408dac832cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/boseximimuka.pdfIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_8adb2c63355347209f169dd17363d860.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/online_video_editor_without.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/98830001035.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wepasekijizifufegebof.pdfIn PDF document text
    • http://nevurewajarip.epizy.com/lizevotuvunozari.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_f3bce627c6db4eb19f41367348865ab2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/vilijuzanefagijojad.pdfIn PDF document text
    • http://godemesefiw.epizy.com/e24_bollywood_news_app.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/bosch_refrigerator_manual_b22cs80sns.pdfIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_ca6360b9f7d94b10ab68e7c6ad39fff4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/what_is_the_renaissance_period_and_how_is_it_related_to_the_concept_of_perspective.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_off0000ff21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF21 5640 bytes
SHA-256: 9c79cacda90e666422ea1095c0b529fb7e17e5a0625f8304d107d5bfb7e5d8da
font_01_sfnt_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 10624 bytes
SHA-256: 83b21a1361b96289dcc3a598ba71a7064dc9b8c54035fe7b0114279f1fac2963

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