Malicious PDF — malware analysis report

Static analysis result for SHA-256 858e5a773f313828…

MALICIOUS

PDF

101.6 KB Created: 2021-01-25 22:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e37455c1001c561b3e8141df745f0a20 SHA-1: 5b718470e648ef5f3adaf0f593f6a82789dad311 SHA-256: 858e5a773f313828b53a01a2c4f4d3a5fcc8c6d5df5ec811e8df12ea7e065d2d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'trafftec.ru', suggesting a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://trafftec.ru/aws?utm_term=fishing+report+tuckerton+nj PDF link annotation
    • https://xirofagoxo.weebly.com/uploads/1/3/4/5/134576207/6187535.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/1977083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444114/normal_5fe0dfb4a6fc8.pdfIn PDF document text
    • http://ubzvp.com/sumimipnfbw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5fccac92cc4c0.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/c1cefe3.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/5223855e787320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fd7940fd43d4.pdfIn PDF document text
    • http://autoupgrade.website/23167510952k3uuf.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/2224266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426073/normal_5fffc0b265218.pdfIn PDF document text
    • https://sesoguxanijiba.weebly.com/uploads/1/3/5/3/135309487/7543806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fceac36131c1.pdfIn PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/bolekoropupupuraxupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipinajamidab.epizy.com/8907678714.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/nunenudamazojusad.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D3 5048 bytes
SHA-256: 9dcae8513f3b4328b7ded3d157479d31fb4f55ce2a83c86bc2da8d5e0869ee7d
font_01_sfnt_off00013b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B09 3796 bytes
SHA-256: 655640703b09a26aaa914507bc31f60f772236f8e800450becacedf43f326c0a
font_02_sfnt_off000149e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E4 11668 bytes
SHA-256: 5200efd3475b1947365ea680f6dc9c09300ed655bedb66bdbc4062c333a0f98c
font_03_sfnt_off000171fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171FA 16680 bytes
SHA-256: 1eab3888b29b29aeb773492e53544336a4ece055c5a7e91301628c1e90022d3d

Open this report in the interactive analyzer, or submit your own file for analysis.