PDF malware analysis — malicious · f214ecd78e7ffa2c

MALICIOUS

PDF

83.9 KB Created: 2021-04-03 11:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: e4bebf296e5f2e3b5072f6611d118078 SHA-1: 2abd2694bd028fcfdc013780d13ad9e13cc0cab2 SHA-256: f214ecd78e7ffa2cf11b3b199bcc1963bd14f2cf157053053a379a984b103b4b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding a large number of URLs pointing to disposable hosting, likely to distribute phishing content or malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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 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
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://druttle.ru/strik?utm_term=casio+pcr-t280+e01+error PDF link annotation
- https://cdn.sqhk.co/lijipatalenu/hfKhitL/farm_animals_names_in_spanish.pdfIn PDF document text
- https://cdn.sqhk.co/gulifunanale/SzjfFhe/9742173824.pdfIn PDF document text
- https://cdn.sqhk.co/xorilulog/cKneohI/31626728767.pdfIn PDF document text
- http://waparudadip.mywebcommunity.org/oxford_handbook_of_clinical_medicine_10th_edition.pdfIn PDF document text
- https://cdn.sqhk.co/wovegorarev/CrGURih/birthday_party_invitations_free_printable_templates.pdfIn PDF document text
- http://moradudipomibo.mypressonline.com/60311510199.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379841/normal_60283b01b5a03.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369917/normal_602394322f627.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382423/normal_5fdfc006c165d.pdfIn PDF document text
- https://cdn.sqhk.co/jufebarur/iajbuE9/64689874195.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453718/normal_6059c97f24285.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413851/normal_6012207602d04.pdfIn PDF document text
- http://rumurel.mywebcommunity.org/73823342468.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372087/normal_60044d686e822.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386081/normal_60594f2f1fc65.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463560/normal_604e66bbb4068.pdfIn PDF document text
- http://juwaniwabi.medianewsonline.com/maestro_hans_zimmer_piano_sheet_music.pdfIn PDF document text
- http://gopusoduj.mygamesonline.org/64032222735.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://xadilopavut.myartsonline.com/past_simple_and_present_perfect_irregular_verbs_exercises.pdfIn PDF document text
- http://gujimosodaza.myartsonline.com/pasosiwawoxu.pdfIn PDF document text
- http://pimebojozewo.rf.gd/84743230050.pdfIn PDF document text
- http://dirazonun.myartsonline.com/mahindra_tractor_price_list.pdfIn PDF document text
- http://vegoxozuv.rf.gd/81570144473.pdfIn PDF document text
- http://muxolisakij.epizy.com/encyclopedia_brown_boy_detective_download.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f3c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3C2	5352 bytes
SHA-256: `f97944070115646adf2cb33c3316a88553f54688f63be63d9ed4401a6db35b4d`
`font_01_sfnt_off00010605.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10605	10692 bytes
SHA-256: `f7ffdbb11ab3cc3a678980576c2b5cf85aa6f93a8e2aa9c7b5dbe05bcd28df19`
`font_02_sfnt_off00012aae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AAE	16196 bytes
SHA-256: `536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3`

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