Malicious PDF — malware analysis report

Static analysis result for SHA-256 db30792d32057db4…

MALICIOUS

PDF

81.9 KB Created: 2021-03-07 03:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac1d1fc93024b30debc3170f4be85536 SHA-1: de00ff1425e9d8fcb4bb1deac343260671c74968 SHA-256: db30792d32057db45dc01926766e7630492ff19128c0c7e9156fff95fe78cabd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The presence of a 'download button' heuristic and the overall structure suggest a phishing or malware distribution attempt. The document body, though heavily corrupted, contains a URL that may be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/aws?utm_term=how+to+get+a+cottage+food+permit+in+alabama PDF link annotation
    • http://xafopawiki.medianewsonline.com/lectio_divina_worksheet.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/velojikajadufuluzar.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/international_law_jobs_europe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_6044211a63260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422628/normal_600a54553e288.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoreve/heBiJ53/54925885344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff95d9538b0f.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/39900201976.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/dalokove.pdfIn PDF document text
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/pinebalezekev.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/gRBdjdn/spinning_top_game_70_s.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/wilidi.pdfIn PDF document text
    • http://finonit.mypressonline.com/how_much_do_interior_designer_make_a_year.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/50_shades_of_grey_free_download_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5ff099b9cabef.pdfIn PDF document text
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/3141a96b0.pdfIn PDF document text
    • https://vagipirisixo.weebly.com/uploads/1/3/4/8/134861957/9bdb5e8be61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_602e00974aa92.pdfIn PDF document text
    • https://cdn.sqhk.co/wetabupi/hajiieB/63147639220.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/ms_office_2007_full_course_in_urdu.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/fe_exam_civil_review_manual.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/tezofuretejom/green_rhyming_words.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/night_mother_skyrim_quests.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/ginaxufigub.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/google_translate_offline_for_pc_free.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_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 5488 bytes
SHA-256: 65789ae9527738b6301cd8d166167390ef79eb871dabd7b09b8145edca0782fa
font_01_sfnt_off000112a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 10816 bytes
SHA-256: 74fa2370f6af7eaa28d28612cc28d945572326fd0ab978633771d724f8897f41