Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f12f1d07f35db3…

MALICIOUS

PDF

85.2 KB Created: 2020-12-18 12:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ee2c8c55071bc5f48097602fa5ee36e6 SHA-1: 970fe7848e90ab30e1eb458341d5a0d0cf87cf50 SHA-256: 68f12f1d07f35db31125291d928c7854d55f5602b09292a160601b3e8de93586
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, specifically employing a 'Recovery secret / private key request' tactic. It also functions as a link farm, directing users to numerous external PDF files hosted on disposable domains, with one URL pointing to a potential second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?utm_term=gif+keyboard+apk PDF link annotation
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/mofep.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/5783654.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/1869650.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5fc9aa3e1119d.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/falifupexipakow.pdfIn PDF document text
    • https://repemigikaji.weebly.com/uploads/1/3/4/6/134608024/kuxelefakelofofegil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fd2e381d6075.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/wotuvewat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_5fcc55d534747.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/4b30b9f7ae9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdc79c85e71df64d6bd9c29/t/5fdc7b664ef20e41a29c34ef/1608285030681/pemupapojutuwenalos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6f864d2523e4b70bf1a10/t/5fccd60f83d2ac65cc125b44/1607259667251/99436404556.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c43aa87939686407a428/t/5fc40b536457125654ba095f/1606683476061/borderlands_2_gaige.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC624 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 5164 bytes
SHA-256: db454fb79e5c64cd7bfe3d9bbb167595deee5437ee0dff44dc59d9a48b859fe9
font_02_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 9772 bytes
SHA-256: 041bf24fbd557247f20f1c26040b80f122ca39fa5372117fb21a214645be3afa
font_03_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 10956 bytes
SHA-256: 22c4ce916abbbf756974bb7fb8daf9783ee97ca3479147155ea23ceacdc4c40e
font_04_sfnt_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 17620 bytes
SHA-256: c5deee2519f1e0932d5ccba8452a8fad0f0a1b21cd878080b8d1fa7c3ae929be

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