Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c83eda9abd4a1f4…

MALICIOUS

PDF

81.3 KB Created: 2021-03-17 14:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: def5b4464e896aea6aeff02b8742110d SHA-1: 759cfd5460ac421fc0ca1ab57edecc33dec1df2e SHA-256: 9c83eda9abd4a1f446aa186d617e098efdd9461a2b7616737592cfdca9ad58d5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though partially corrupted, references an 'iPod nano 6th gen screen won't turn on', suggesting a lure to a fake support or troubleshooting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=ipod+nano+6th+gen+screen+won%2527t+turn+on
    • https://rekepepijo.weebly.com/uploads/1/3/4/0/134018016/wawesufapatiloti.pdf
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/49e4209b87b.pdf
    • https://zawobulogu.weebly.com/uploads/1/3/1/0/131070044/264275ec997c.pdf
    • https://kinojakabajowus.weebly.com/uploads/1/3/4/7/134774968/035b6b.pdf
    • http://notudokebifapaf.22web.org/xl_blood_pressure_cuff_manual.pdf
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/1330028.pdf
    • https://likemojinefafus.weebly.com/uploads/1/3/1/4/131406739/dokikutad-farilaj-vokekuzirinore.pdf
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/werurilajigide.pdf
    • https://mogivara.weebly.com/uploads/1/3/2/7/132712472/7005228.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_9eb704b714014746a58c0bb904dbbcb5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58fe4c6f-5928-48e8-9f60-8f8b91f176e7/gamopowepesi.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_8314f5d40fe54ec4952b7aad5c76de95.pdf?index=true
    • https://uploads.strikinglycdn.com/files/08371c36-7ce9-47d3-8f2b-c05e6e111859/description_of_stars_and_stripes_on_us_flag.pdf
    • https://uploads.strikinglycdn.com/files/804441dc-445b-4de7-9ece-94bb980c25fd/86436975175.pdf
    • http://zasegusof.epizy.com/vcenter_client_6._7.pdf
    • https://uploads.strikinglycdn.com/files/4a71423f-000a-45e8-b6d4-518319bdd4ef/17510291004.pdf
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_2dcdc09900f74dd18a4794f0ca85b385.pdf?index=true
    • https://uploads.strikinglycdn.com/files/000b36e3-6378-4152-8ddf-44ebb5f3f279/gevexunulevenokafidifi.pdf
    • https://uploads.strikinglycdn.com/files/c0b76a31-e13f-4671-a4ec-c08c8466c5e1/how_do_you_put_the_weights_back_on_a_grandfather_clock.pdf
    • https://uploads.strikinglycdn.com/files/d97749da-f45d-495f-b4fb-04d5b735aac7/hp_photosmart_c4580_ink_asda.pdf
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_807d1a9dd7c04eb3abb280c0ec3b7f08.pdf?index=true
    • https://uploads.strikinglycdn.com/files/964d9cdb-938c-4830-bd56-a96b4db5cb14/48114521260.pdf
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_61cab6e768144c0ea40b837093fcaaeb.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_off0000ef3e.bin
0e87cd05f332aeb2a72b3daf131c0310eff8a4a40b86507956a7cca2f5d1d305		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 6168 bytes
font_01_sfnt_off0000fee0.bin
48572a7e6b53608bcd28b1353ca779b2db7883c4d62ae11f7c1182bb5cff5397		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 5520 bytes
font_02_sfnt_off000111bf.bin
45e1055e4d2c1ef36f11122402b2cf8c3fcdc4697273e7fdbd1bfa8b601932f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 10836 bytes

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