Malicious PDF — malware analysis report

Static analysis result for SHA-256 baba5b510c4ad596…

MALICIOUS

PDF

70.5 KB Created: 2021-03-14 02:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bbbf1e0fb7fe2fc743c640971f9ce9b3 SHA-1: a5e77459ee96adb2c3821a2392e49d383014bd92 SHA-256: baba5b510c4ad596bd56daba6d8fbac76f1694be843f5a0bcfb2f52b00a99d53
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-themed and point to benign-looking PDFs. However, one primary URL, `https://xezojetit.ru/award?keyword=adverbs+of+manner+and+adjectives+exercises+pdf`, is flagged as malicious and likely serves as a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=adverbs+of+manner+and+adjectives+exercises+pdf PDF link annotation
    • https://jazowamiwig.weebly.com/uploads/1/3/2/7/132740249/banigivelesuva.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/5f38d1fc97d177.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/taver_wofeki_gijipurimipib_pisavapifozo.pdfIn PDF document text
    • https://netivexis.weebly.com/uploads/1/3/4/0/134042514/xadukutima.pdfIn PDF document text
    • https://saxetesaw.weebly.com/uploads/1/3/5/3/135301220/67b9d1d7.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/fda18ff128e.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/woneketelak/maniacal_monkeys_bursting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/aggiornamenti_android_nomi.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/bomberman_classic_game_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c054fb-bc17-438a-89c1-2db473ad6197/why_does_my_vizio_tv_look_blurry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042ea5e3-8cb2-4a8c-9c8c-bff3521a2f52/siruvivugofidupiwagusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f07907-5ad0-4245-88c3-604c2a08bdcf/what_did_the_mark_of_cain_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/the_skin_im_in_chapter_11_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9f9aca-e214-4b52-b529-4575761edaa0/79328594542.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/73361928421.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/vejajubobuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba734498-a853-4fb7-9939-8e908a8fdace/what_is_the_best_dog_for_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96af91f6-36be-4b06-a429-44dbf88d1b0a/18955509479.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/setting_healthy_boundaries_in_recovery_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2093ab2-d3a0-4e4d-9f3c-9f3c377585e7/visogawamuze.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_off0000d563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD563 5604 bytes
SHA-256: 2b49bc89b96ef8dcd66f5ff61a44f55c8b04e311c7a94784cf746af8c27cc389
font_01_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 10480 bytes
SHA-256: e20b532a1cab3465365c1c045c067b593343ab6faa7b014a1959a0559c13d27f

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