Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2c09b61e9fdcad…

MALICIOUS

PDF

82.5 KB Created: 2021-04-21 02:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc3b3dbef22c155f4eabdb963796e4ec SHA-1: 938f622a11c86718658133e98684d73887e794b9 SHA-256: 2c2c09b61e9fdcad254a82648f6c33c46e3d4f1fabc1c1590c4c39f634cc2b0f
226 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting itself as a real estate document while containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring the user to click on a link, such as https://crophysi.ru/strik?utm_term=what+is+a+grantor+and+grantee+in+real+estate, which likely leads to a phishing site or further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+a+grantor+and+grantee+in+real+estate
    • https://dusibijerike.weebly.com/uploads/1/3/2/6/132695870/sugoxememusi.pdf
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/8469068.pdf
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5fed6f910a256.pdf
    • https://gajodiwu.weebly.com/uploads/1/3/4/0/134042407/vumijaguvudaroz_rosom_fekebepinofuniz.pdf
    • https://kuxubujokug.weebly.com/uploads/1/3/0/7/130775750/4498045.pdf
    • https://cdn-cms.f-static.net/uploads/4408343/normal_60605eedd8d9e.pdf
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/4735118.pdf
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fd652724f722.pdf
    • https://static.s123-cdn-static.com/uploads/4447273/normal_5fc903b74af5c.pdf
    • https://kexezesokofu.weebly.com/uploads/1/3/3/9/133986719/jugupenosuwon.pdf
    • https://tezosarotijup.weebly.com/uploads/1/3/4/3/134305137/lukenik.pdf
    • https://faruroju.weebly.com/uploads/1/3/5/9/135986438/juvivop.pdf
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/zupodowonekuno.pdf
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5ff29169b6247.pdf
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/jovubepuzusesuni.pdf
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/7342255.pdf
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/1598205.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29163c95-4d7a-44d5-a8c5-d84f27265064/is_gluten_free_oatmeal_good_for_dogs.pdf
    • https://uploads.strikinglycdn.com/files/7ae99379-790f-48b3-814d-793de3663e11/model_3_second_hand_price.pdf
    • https://uploads.strikinglycdn.com/files/1c5f23b8-1e20-472f-b45c-b53edb7b0cc0/samsung_rf267_not_making_ice.pdf
    • https://uploads.strikinglycdn.com/files/ab5e4b38-2739-464d-a079-c00cae3ef65c/ejemplo_de_curriculum_vitae_para_primer_trabajo.pdf
    • https://uploads.strikinglycdn.com/files/3e754de0-e22d-4665-9b86-6c86b181f981/tonuwutavaki.pdf
    • https://s3.amazonaws.com/najubu/unlock_code_for_verizon_lg_4g_lte.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d8.bin
bd3ab12883d6c7ae85e5f1868762481713ba0ab6d4c8698262581b8f2ad1357e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D8 5100 bytes
font_01_sfnt_off00011534.bin
5c51b49a6be9421809a083357d09d8c9b585c2e5ff031341c8e75bdb2a0c8f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11534 11012 bytes

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