Malicious PDF — malware analysis report

Static analysis result for SHA-256 649ff87623853720…

MALICIOUS

PDF

83.2 KB Created: 2021-05-05 11:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f6395743ace13dfc1b2c76d5e58d787 SHA-1: 82aab81ed7a50f337c1ab967d5b8956ec7092e5f SHA-256: 649ff876238537208cfcc0abae976fcaa191cbe2f1edc5394600ad5448a332f9
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary external links, 'https://resalured.ru/strik?utm_term=honeywell+portable+air+conditioner+manual+mm14chcs', is suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier further support the malicious nature of this file, indicating it is a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://resalured.ru/strik?utm_term=honeywell+portable+air+conditioner+manual+mm14chcs PDF link annotation
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/3b96101f10c.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/ugcVjd8/17999192551.pdfIn PDF document text
    • https://gatodagimisosog.weebly.com/uploads/1/3/1/3/131379801/bomenukalig.pdfIn PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/nujopa_wafego_sitine_jiken.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/fnhfYhi/little_panda_farm_story_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/0thdhjU/54332781461.pdfIn PDF document text
    • https://mikudope.weebly.com/uploads/1/3/5/3/135305195/8bcb75b4e26.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/iaPibdt/rgulation_du_mtabolisme_des_protines.pdfIn PDF document text
    • https://juzunuxav.weebly.com/uploads/1/3/4/3/134316531/pesuzalawuwozib-gutos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_de0298c9e1da405da6e41f8e0569979e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/automated_driving_system_toolbox.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/zefubivitu.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_6fafd38127344fadba1f2ce6a7b3e16d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/novela_balun_canan.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_b18858e44cf8400cb13807cab33a46df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/fulab.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_bc2318e63d4743febebdff4f9df679f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lewuli/wilexafana.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/doresolawitibagun.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_93d31eead6674caaa83b4d2d365ec7bf.pdf?index=trueIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_80fb6aa97e2c41b8b6d491ee4e35df4c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitok/fedasapuvokanupinewotexi.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/lojuvuxebodoxope.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_a5d526b5b16e4ba99263bfb207264755.pdf?index=trueIn 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_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 5748 bytes
SHA-256: 2a790f8038aab67c69d8f3e9f7841155eef803372b43725ae489d0cfffd1069a
font_01_sfnt_off00011798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11798 11432 bytes
SHA-256: 3d811a473d98a876f1502b0a772cf18869949c69ca48d343f057a6f5c7d04b39

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