Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bfd0c291f1c94a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-28 22:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4008fb12c64595d4bed0c22286bdec1 SHA-1: 130a387d1f3ae418c0c43531dfed7c06a3da1233 SHA-256: a3bfd0c291f1c94a00a864f0d7223f61728d827c98e3b6233b9150dea25fd9fe
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ponafet.ru/wix?keyword=potassium+nitrate+and+sugar+reaction PDF link annotation
    • https://xiriwedonup.weebly.com/uploads/1/3/4/2/134265341/tonoweg_wamazara_musugejum_wezidajidovuz.pdfIn PDF document text
    • http://my-favshop.online/solubility_curve_worksheet_cphs_chemistrywn0j3.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/5e3a53.pdfIn PDF document text
    • http://dontbeshy.xyz/how_to_find_ip_address_on_cisco_portk72n1.pdfIn PDF document text
    • https://xevupuwikuguv.weebly.com/uploads/1/3/0/8/130814145/monolezawa-pitunabagixelek.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://s3.amazonaws.com/begijufadi/zukurikofonesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be08043c-1abc-48dd-9f43-6d9ccb86d372/how_can_i_activate_my_iphone_4s_without_apple_id.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/tor_browser_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/wijejebanepakijezasu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/icelandic_alphabet_pronunciation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/81986771791.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/48664301304.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/sulaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c213c813-a884-4cde-928c-134ddf00711b/best_manual_tile_cutter_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/xuregokovakiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/car_drift_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/bhagavad_gita_telugu_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/fanipunegekufikid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c5e94d-056c-43d9-91ca-abaee795f1cf/rurowamerop.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_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 5112 bytes
SHA-256: 99ff801dc3ae1dbee486f9daed48683f678e71cd3063606c036ce6ad45921f2f
font_01_sfnt_off000101e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 11264 bytes
SHA-256: 5d131d1e990f0c32537c10e621ba51bf06bb1f85400e1a2bc2aa959ef4a33443
font_02_sfnt_off0001278f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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