Malicious PDF — malware analysis report

Static analysis result for SHA-256 1561938b5bb64877…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 19:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 43343e05bb292cda560e5dd765c2e160 SHA-1: 4f98a24d715611f9fadfdb12b76379af5eff0bd9 SHA-256: 1561938b5bb64877795c94f0e4e676ca1cc43282a7e117738a5894cd1af4b9d4
156 Risk Score

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 0.9957

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://midufefew.ru/wix?keyword=tyler+state+park+directions PDF link annotation
    • https://cdn.sqhk.co/buzaxelubot/jigfoeN/zinadaxigasej.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/is_red_13_in_ff7_remakeio380.pdfIn PDF document text
    • https://cdn.sqhk.co/vudasobije/8ljbIjg/37229129657.pdfIn PDF document text
    • http://ek-arenda.ru/dvdms_portal_biharcqutp.pdfIn PDF document text
    • https://cdn.sqhk.co/nulegudup/eojbWjh/patchwork_duvet_cover_king_size.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/wokalugive.pdfIn PDF document text
    • http://intekzafast.online/981771073703n1y3.pdfIn PDF document text
    • http://fherixq.com/what_to_read_after_eleanor_and_parkelsx3.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/7e3dde07f65794.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/jGqTjFq/samsung_galaxy_live_wallpapers_hd_free_download.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/roxifivujixade.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/zerepuzuze/are_there_any_transatlantic_ships.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/zivakilezosijifunodawut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cfbbc5-b5a3-4b98-929e-cdaa672c77bd/54308389394.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/swann_doorbell_camera_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/phrasal_verbs_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4b4554-a331-43ba-8020-747bffb94340/les_miserables_2012_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/49300590920.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/ceiling_fan_size_guide_hunter.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/yowhatsapp_apk_free_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/articles_and_prepositions_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73baa2a4-8b28-4c2f-928f-6807765f1d63/how_to_change_a_whirlpool_stove_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d18e05-f053-4445-a7e4-0f4afc3659a0/30689221953.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/royal_blue_formal_dress_off_the_shoulder.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/15407916757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f481933e-ab5c-4e89-bf62-58d72d5595fd/vedumebikok.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_off0000e642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 4968 bytes
SHA-256: 1abd05913cff57d35a66ca245be192ee155d5c671843bc242f0bcf5670734cc0
font_01_sfnt_off0000f735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF735 11188 bytes
SHA-256: d3cb40836ad82bcade0dce5f3af792135b8391e914f8facadadace3e6206ea46
font_02_sfnt_off00011d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f