Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39d15b4e69d01c4…

MALICIOUS

PDF

77.0 KB Created: 2021-01-04 20:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ec0e2d9a51e5aa33e2430caaba849106 SHA-1: 206b94079183de7e973d427b3f2cb6198906c052 SHA-256: f39d15b4e69d01c48b6dc6a35b939c2ac3c2ff8dd47f6697ef63b454a27d944a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF_SEO_LINK_FARM heuristic, suggesting an attempt to drive traffic to various websites. One of the primary external URIs points to 'traffnew.ru', which is likely a malicious domain. The ClamAV detection and ML classifier also strongly indicate malicious intent, classifying it as Pdf.Phishing.Trojan. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to act as a gateway to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=basara+2+heroes+psp+highly+compressed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5ff264853861b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fd5ff3004f88.pdfIn PDF document text
    • https://muxuxinipizo.weebly.com/uploads/1/3/1/6/131637853/wetotuvew_rexituruvaxisak_susexefu_xagipefatunedas.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fewuwefuvufu.pdfIn PDF document text
    • https://vefekigut.weebly.com/uploads/1/3/4/3/134391246/1756483.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/dubiditiginowo/endeavour_tv_series.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/desurexuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/43820392225.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/all_cheat_codes_for_pokemon_emerald_android.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/68183018099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d215af84-3c4b-4353-a073-66380f720c44/79400634330.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/amd_radeon_hd_r5_230_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035fb91a-2337-4a75-b600-231e403106a3/33285858312.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD54 6476 bytes
SHA-256: 94c320145ca2f8416457429c8e3963abd65d7ae1fc422bfef73da4ec62109792
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5772 bytes
SHA-256: b5af918d4aa744276563b4f7f0fefa61d520183f9bcc3c5d702ab33cc23fc237
font_02_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 11104 bytes
SHA-256: 26226a8fc7ee4f45dd635ec213bd5dc2a14f74ac641d5be955f5c07735320da8

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