Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdaf47ba36fbcfe7…

MALICIOUS

PDF

79.5 KB Created: 2021-04-02 22:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4141df7b562fc02da378fe5659fd5207 SHA-1: 79b820990e6be64ccb10b135b55275c0616c771b SHA-256: cdaf47ba36fbcfe76f9a9905acc99e07a476c6cd7369169f726f22581a96decb
244 Risk Score

Malware Insights

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

This PDF file is classified as malicious and contains a large number of embedded URLs, many of which point to link farms and potentially malicious redirectors. The document body, though heavily obfuscated, suggests a lure related to 'seasonal affective disorder treatment pdf'. The presence of numerous external links, including one to a known malicious redirector, indicates an attempt to direct users to harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=seasonal+affective+disorder+treatment+pdf In PDF document text
    • http://imedo.ru/argumentative_essay_outlinextv70.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/dxoijjd/joplin_missouri_population_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/weridosotuk/afgiggR/hf_acid_safety_data_sheet.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/nelafexujemoli_votasufoneni.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/verunekikola.pdfIn PDF document text
    • https://wefenofutote.weebly.com/uploads/1/3/4/8/134873272/kazonefa.pdfIn PDF document text
    • http://lg-copyright.com/233386590481nmdu.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/tegagovezobuvuse.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/kugasipoju_xusuriraruvewex.pdfIn PDF document text
    • http://naturebiolog.fun/43753521251mkuyf.pdfIn PDF document text
    • http://limons.space/how_to_take_your_permit_test_online_minnesota9vnxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/cRjjagg/dibijenowar.pdfIn PDF document text
    • http://cuzinfo.ru/church_administration_definitionckeoy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_d052743ca7654ab38e1f61596d266f0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/61359821299.pdfIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_88b46b2e05924661b9c6e53898e9f74d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/dipuditerifi.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_3af6d1922fdc448ba65e14212d4eb5ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0669ce02-cf2e-41d4-8d01-71f53fd00fd9/arbys_menu_calories_sliders.pdfIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_fa6b24f12d414c0cae5e6f0009283db8.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_853269749d02439282ea1cca3ef1c32b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/032b8654-b2e6-49ab-8441-8a5007d35d95/49781021469.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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5464 bytes
SHA-256: b7d7942442d50c5da965511dd32c60d40d003b31be067dbd628fbeecf53adc06
font_01_sfnt_off00010ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 10752 bytes
SHA-256: 66001342cb04e404e5f1dd5f5f7ba7fc6611f403ca4f35c4a0a3e24cb3528937

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