Malicious PDF — malware analysis report

Static analysis result for SHA-256 8712a3697cfd4afc…

MALICIOUS

PDF

128.2 KB Created: 2020-12-22 14:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 010e4ceff2d7b3312b91d80a000a2969 SHA-1: 7869772891a8abb85632b694108ddf9cc019146a SHA-256: 8712a3697cfd4afc4f9d4835b2f3489c520fe3595edeea3080a94e81975cbb45
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to "B a n ki full form". The presence of numerous external links, many of which are SEO-optimized PDFs, suggests an attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=b+a+n+ki+full+form In PDF document text
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/251a2397fa53.pdfIn PDF document text
    • https://jixivegeparimes.weebly.com/uploads/1/3/4/7/134749144/686aaeb8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/920399d7-b239-421a-89d9-914a1d979d84/water_filter_vacuum_cleaner_vs_bag.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/paper_bag_template_svg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d69e5e8e827d42afbc56/t/5fca776da08b9342fa9aef03/1607104365362/diwirefamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a577f27-75e7-4b4d-afaf-7fa847821eb0/positive_thinking_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/sezimuva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f4615687f52b6b8e9594/t/5fc48d68f8cdb769c6750d26/1606716777101/lujatunodetekasajipujobog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e588e1-133e-4c72-b464-5575bd93d698/guduminozigufomutumifenon.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/internationalism_vs_globalism.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/ramirudagididawen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebdbc8618956c414e0ded/t/5fd6f318164d0f203c90fd11/1607922456420/pijekenu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe19c84033c0c7f0c9b5720/t/5fe1aabb870087684b117fe3/1608624828149/grade_6_math_decimal_place_value_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdebfeb2dcd53187f206807/t/5fdece78f5f642265651c0dd/1608437369696/zajagurufarafufe.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
font_00_sfnt_off0001acd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACD2 3484 bytes
SHA-256: 297d8885d8a4f97ce32ce003dd8bb9fe96f6a48176cdd5c8174858b8ee18d3ee
font_01_sfnt_off0001b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B94F 4848 bytes
SHA-256: b40ece17a003c41387c73f2a80c1c9708cbf5c5ac11c358130e47b6fd5c92711
font_02_sfnt_off0001c9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9BD 13064 bytes
SHA-256: 5e3d39e291687531abeccafa3a0e302d3126f9c9cca5d9eea9f5b5945cdc7c1a

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