Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63b01c26079ddc8…

MALICIOUS

PDF

127.0 KB Created: 2021-03-14 19:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e572a6dbb2e090d55e751792f93da90c SHA-1: 58113391378a312301727656555fe927fc34ad4d SHA-256: c63b01c26079ddc8638ba71df42158e1895f1278276391a90b1db9467a2b887d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM', with the primary malicious URL being 'https://kuzutuzo.ru/award?keyword=chamakam+pdf+telugu'. This suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://kuzutuzo.ru/award?keyword=chamakam+pdf+telugu PDF link annotation
    • https://lefukumot.weebly.com/uploads/1/3/4/8/134887275/f740d1526109dd.pdfIn PDF document text
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/lolimexe.pdfIn PDF document text
    • https://lafupoboj.weebly.com/uploads/1/3/1/8/131857117/5529221.pdfIn PDF document text
    • https://dexigator.weebly.com/uploads/1/3/6/0/136049715/dituzumovolol-delobipi.pdfIn PDF document text
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/fojedujofenerad.pdfIn PDF document text
    • https://mukavotedi.weebly.com/uploads/1/3/1/8/131856112/4011719e7e23.pdfIn PDF document text
    • https://dogusomuribe.weebly.com/uploads/1/3/0/8/130814063/fujebekalefoxi.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/tokoxirerufiboxof.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/reseramesogixop.pdfIn PDF document text
    • http://reredikulole.22web.org/king_lear_quotes_madness.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/the_solstices_and_equinoxes_worksheet_85_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/velojujepulufeg.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/30234800607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285db9bc-153a-450a-adb7-b353d7932d76/yogasana_books_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/elan_touchpad_driver_windows_10_acer.pdfIn PDF document text
    • http://jinujatafariva.rf.gd/87461590534.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/66992454262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1addb8-4391-4bf9-830f-c3b41abbaa82/93118198427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13dffb84-3ded-47e2-85ad-c4af29a3a38e/car_service_list_template.pdfIn PDF document text
    • http://xebizeluzifavi.rf.gd/gurunanak_amritwani_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/bourdieu_social_capital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4009770-ded6-41a9-be04-272a7b67158f/76219037518.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/55276148348.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DD 5152 bytes
SHA-256: c5828a9cf4c48be682d078cc244d00dec25ce3f8667d4ad5eb8be165617e4826
font_01_sfnt_off0001453b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453B 3772 bytes
SHA-256: 9389eabb5da0f7ff5893e499ff791b47d46466a46589dcf6e6727fbd9e34bd63
font_02_sfnt_off000150df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DF 61884 bytes
SHA-256: 3b8a2f15d00a06329e22ab6942dca3eb7251c8899b3cb2ea9bb6678ee0fb7bf5
font_03_sfnt_off0001c045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C045 9340 bytes
SHA-256: 0060d076d3a7f99bed21e2a4b308f43851c65bc26faea7e8ba5535350da8fc1a
font_04_sfnt_off0001e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E03F 2816 bytes
SHA-256: f74cd5da1b6b89fe668939328998f6c1e0be1ca39db24a1b8f23f8b125fea371