Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b30af790038199d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-30 20:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7d7f1ca9463a3464e66e9fc4309cee SHA-1: 258988bf864deddac02dc8c7d2a1772f50e2b320 SHA-256: 7b30af790038199d6b54aa2942ca196002b652ed258356883c262c97c6aa8784
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristic firings point to a large number of external links, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains keywords related to 'Carnatic songs lyrics pdf' and the authoring application, which are likely lures. The presence of numerous external URLs, many hosted on Weebly, reinforces the phishing and link-farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://lozipotod.ru/award?keyword=carnatic+songs+lyrics+pdf
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/tusumusonar_xidiwelojugagax_fulizu_toten.pdf
    • https://sopetenoredu.weebly.com/uploads/1/3/5/3/135318191/tuzunufira_luziwekekito.pdf
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/lirorafiti-xilokofeji-benisigat.pdf
    • https://nivosuvadifo.weebly.com/uploads/1/3/5/3/135384950/xufabene.pdf
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/wetevogokotan.pdf
    • https://jaxemojemilela.weebly.com/uploads/1/3/4/6/134622921/wujevil_rudixulaluw_nejukere_zusuredav.pdf
    • https://nujusokomofevak.weebly.com/uploads/1/3/4/5/134503883/174d0c770cb4.pdf
    • https://pezuzaje.weebly.com/uploads/1/3/4/5/134577214/1022219.pdf
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/gifotogotefazek_sosategisufuse_nowuwosumev.pdf
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/zuliworesamuxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_9df8e859694c4f7b8861a619bd413caf.pdf?index=true
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_d81d6abf0476487cb124b0956b89096d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/74f70107-b712-4397-b787-36985c2f994e/94990760249.pdf
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_b105ce44d835425c840a22888b5329b0.pdf?index=true
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_7a7c46b66b2146f9b4e955cce1b2e205.pdf?index=true
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_7361eeccf5264d9dbb587deb93ca06fc.pdf?index=true
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_547e61dcae01449fb0c405427a9104ba.pdf?index=true
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_5640c75d063a4a0eb571822d758cc330.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf10d7b1-3227-4488-b3d2-5ffc923f3d47/buxibesazabidelevomu.pdf
    • https://uploads.strikinglycdn.com/files/b599b284-1834-41ca-8023-da5c3b2e21c7/love_dare_book_reviews.pdf
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_35f255cccfb0417bb1e00bc2d4d04fd4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9844f064-653c-499b-88d0-e6bfce36e0ce/how_to_do_mole_conversions_in_chemistry.pdf
    • https://uploads.strikinglycdn.com/files/def34a00-66a9-4515-b367-eeadbf346685/the_way_to_love_anthony_de_mello_review.pdf
    • https://e62d90d9-845b-491d-b9b1-804d55ccd6e6.filesusr.com/ugd/6af1ed_35af4520e37f40b6964a1384cb468809.pdf?index=true
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_80c6132e0ad943faaacf7a253f13286b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b1.bin
dc37039d862e57c921b11b0fe4808fe6dfcd33314fff7819a188830014174fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 5328 bytes
font_01_sfnt_off000107e5.bin
1a5ef1a8cae143a7a5324b37723560a3775d4936b8941c43c1bd192a8b58539a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107E5 11052 bytes

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