Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b296a496825d32…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 03:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c482385e54288dd6cd3b19a2eca3ec SHA-1: fdebb61ad0a8446697b9d73940d42845afed33ae SHA-256: b8b296a496825d32eb258fada4be6c9d9eaf8b06b0f9d00212a87025d19ff450
196 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign-looking documents, but one URL, https://golowaki.ru/wix?keyword=chippewa+county+mi+register+of+deeds, is associated with a known advance-fee scam lure. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into a fraudulent scheme involving fake prizes or parcel deliveries. While no scripts were extracted, the PDF structure and numerous external links suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/wix?keyword=chippewa+county+mi+register+of+deeds
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/kezadekonuneg.pdf
    • https://cdn.sqhk.co/rupomotiz/qjfnifH/annals_of_fuzzy_mathematics_and_informatics.pdf
    • https://navanelesud.weebly.com/uploads/1/3/0/9/130969746/85a7411be5c4.pdf
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/zaserapag.pdf
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/womirexowuwase.pdf
    • https://kasugokadudibuk.weebly.com/uploads/1/3/4/7/134740653/weboro_kuzow_zanujigu.pdf
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/kaxan.pdf
    • https://cdn.sqhk.co/sosexazefip/gjahigh/running_fred_apk_mod_1._9._2.pdf
    • https://nanowoduz.weebly.com/uploads/1/3/1/4/131414019/tigemelulaneges-devuforu.pdf
    • https://cdn.sqhk.co/xapewiwud/ifjcVhe/racing_go_kart_wheels_and_tires_for_sale.pdf
    • https://cdn.sqhk.co/makafabakuna/fIijCCn/football_tournament_manager_host_online.pdf
    • https://cdn.sqhk.co/rabovafom/jj4R7ia/15125130004.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d71e93df-9546-4f06-9558-c39022fb7b01/turning_process_in_lathe.pdf
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_42c6414c287b4eaab07c1e02a4c74274.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b3ba47ac-7781-44c4-bcde-4c4d64845bfc/pixawagomuzemotun.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_10f6d9ad638e407394f6e973accf4442.pdf?index=true
    • https://uploads.strikinglycdn.com/files/665c8ad9-8956-4c47-aaf4-fb9d407353f4/different_types_of_clothes_fabric.pdf
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_05165319ab3e4054a14bb64973da679d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f82a28ab-4bc2-40a1-b07a-a7fc902015f1/golfbuddy_aim_l10_laser_rangefinder_reviews.pdf
    • https://uploads.strikinglycdn.com/files/51194954-a416-433e-8198-bf8e8d7579d1/old_school_music_2000_list.pdf
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_a93205d05024457d86749486a9b096c0.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0f.bin
03cdf1868a1a1f1ec27674aa2e0c6f982861b7cb86d7fda615b03d20290ce326		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 5636 bytes
font_01_sfnt_off0001011f.bin
d2f2d80bc9da6437d23d32a771708a8394cc3b834f01182ff29b3fee1166f569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 11096 bytes
font_02_sfnt_off0001274e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 4324 bytes

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