Malicious PDF — malware analysis report

Static analysis result for SHA-256 f713d4fb1a7dcf8b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 15:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6af07d2dfa534081f1ab3306ca5670bc SHA-1: cc9c39c4885d2bb42c293cfb9df0bb61198edf4f SHA-256: f713d4fb1a7dcf8b1b1c6cb2ddc0ff0b7adf31256ea7edf2d94b672c01dca060
154 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 pointing to disposable hosting, suggesting a link farm or SEO spam operation. The ClamAV detection as 'Pdf.Phishing.Trojan' indicates malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is used to host numerous external URIs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3477

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/award?keyword=calendario+liga+nos+2020+pdf PDF link annotation
    • https://nejavolezi.weebly.com/uploads/1/3/4/0/134017816/f2b13217ad.pdfIn PDF document text
    • https://sisasava.weebly.com/uploads/1/3/0/7/130738988/3ef563b58dfb32.pdfIn PDF document text
    • http://familyit.pro/77050160276cg1me.pdfIn PDF document text
    • http://copytoshka.ru/12721898438cjlsu.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/vubet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5ff76e177d408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407304/normal_5ffc9ce5d195f.pdfIn PDF document text
    • http://dezlice.ru/51851284842ixfd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fd621d6dc848.pdfIn PDF document text
    • http://morpeoplelife.ru/numoxaguva268p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_601fcdab84ab9.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/4140173.pdfIn PDF document text
    • http://future-techno.ru/tukujuzipupupokeweresuy7gv5.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/1292974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xomepixo/vemijene.pdfIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_5af08d739b784f52932a105e50a86608.pdf?index=trueIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_438a37fb27f0469da7524288e15cad91.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_fa69fc05f58f4d99aef64f06bd952769.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/44128476212.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_4ca1af69e6fc46b7a97fce08993ac232.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farokof/monijikiwis.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_18b78e77bd5c42ceafaf4f12c88b251f.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_cd807899b64f47eca241d05f5b433d89.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_ae022d995c8744e09ad051700cd7e478.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lerezazo/aarakshan_movie_hd_video_song.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_60e5458324fe40d192c912ac42ff4f7f.pdf?index=trueIn PDF document text
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_ba0e6302e8a441c7aa45f1347ead94d8.pdf?index=trueIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_6432685ef22846ada034cfe6e58f97f2.pdf?index=trueIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011ff7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11FF7 5934 bytes
SHA-256: 1782e043da0eeb28c4fcef31fa31505ccfe7d0fae5b22d443e7c0691d44cef46
font_00_sfnt_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5388 bytes
SHA-256: bfbec00fd875aca80f8dda8cf0e49766e0902e943e104dec57254e16f13e23e6
font_01_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 11968 bytes
SHA-256: 949ff746aa6598ef54c851a4d3f171a45d763103cb33fedb83555bea13e1d30e