Malicious PDF — malware analysis report

Static analysis result for SHA-256 19695110abf6814c…

MALICIOUS

PDF

104.1 KB Created: 2021-03-08 17:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c46634202e69f8fcd281b49cb336fe2f SHA-1: 1ea16848d2905d3df5dd029d54e6a39b2f580994 SHA-256: 19695110abf6814c18b963d7cafc524a2d34976fcc9d228db659dc35f4a40ab1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be related to search engine optimization lures, attempting to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=chicken+biryani+in+tamil+language+pdf PDF link annotation
    • https://wamonudikiso.weebly.com/uploads/1/3/0/7/130776885/tezelo_piwoniletiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408704/normal_6004b796c9f44.pdfIn PDF document text
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/kijip-kumejuwef-mafesirubo-besononuvezad.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/fififie/61336589247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_5fe144750c9fe.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/2894761.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/lixisidoz.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/heY0TTn/linkin_park_tour_2020_osterreich.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412391/normal_602532f148fe4.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/xofaxinumugogu-bipapenus-kejezej-kodaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fe280c51fc73.pdfIn PDF document text
    • https://mazokameviseg.weebly.com/uploads/1/3/5/3/135349474/4436513.pdfIn PDF document text
    • https://tofavasexivefet.weebly.com/uploads/1/3/4/5/134578877/nitutukuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393503/normal_5ff1b4f8bdf65.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/MhdHnih/wokapumikakivoli.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/1059002.pdfIn PDF document text
    • https://pajodiwid.weebly.com/uploads/1/3/0/9/130968992/ganebirowijoza.pdfIn PDF document text
    • https://bopegaxuz.weebly.com/uploads/1/3/1/4/131406849/zovejutasazete_kunakosekemu_xufegimumono_davudiz.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/losuxofozinadakilix.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/76720387658.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/how_do_i_use_poll_everywhere.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/30985682859.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00013fdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FDC 20800 bytes
SHA-256: ab3400105d025d6cda5193c5dab2b2577f6acd60f54b7d43ca1ae3b06143b8ab
font_00_sfnt_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 5604 bytes
SHA-256: b6396895a1e3589e7de8d5357d3641f14dc98b4418a40183a7504b86260405d9
font_02_sfnt_off00016c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C35 11272 bytes
SHA-256: ed482558a88e93c5fba26275295e4086c9e5fbba2c4b9ca27e0206375edfbe78

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