Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ceae8117ff47fc…

MALICIOUS

PDF

62.2 KB Created: 2021-01-02 05:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cdb4018fbef78bc36314c3dac237f5a5 SHA-1: 800f7927842d2c5f446549f8e7881b0d6d60e72a SHA-256: 04ceae8117ff47fc61421cd9a6b9f2b4d60df112b4a4deca7dcad31a93e4e77a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, https://trafficel.ru/123?utm_term=a+room+of+one%2527s+own+chapter+1+text, is likely used for phishing or SEO manipulation. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious sites, potentially leveraging embedded JavaScript for execution.

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://trafficel.ru/123?utm_term=a+room+of+one%2527s+own+chapter+1+text PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496204/normal_5fe3de91a6fa7.pdfIn PDF document text
    • https://fobibopokigafo.weebly.com/uploads/1/3/4/7/134702456/jexikatakule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_5fd0d9e7a28a4.pdfIn PDF document text
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/1006970.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/197d1129-5f4c-4aeb-ae8e-6a65d606056a/kadabum.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/56610112069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efbfbc9a-bb30-4768-9de5-05e7b58f972e/pet_maxing_guide_rotmg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcb7c01-242c-48bd-98d6-233f7e48e575/30544681476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa33fa26-8df9-4f85-b049-92297bb31455/jiwudobiwolobeliduxejuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48f100d-a926-4f8a-90f7-c7769607af2a/tevowixazigibejasowan.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/fractions_decimals_and_percents_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/5295106468.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/wevatawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160c173a-1a1d-4586-8f16-43dbd8a4390a/40993779423.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/juliantina_movie_release_date.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B8 5460 bytes
SHA-256: 61fbb79d4189dc89e319f3bfc2e9afeceb99af72d3616787ee11b7b5a27774da
font_01_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 9600 bytes
SHA-256: f1d3e6beb9ce73fede7aa291fc0c209759b56990432916c56773b34c9f0538c0

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