Malicious PDF — malware analysis report

Static analysis result for SHA-256 113fccfefda2d8ae…

MALICIOUS

PDF

68.4 KB Created: 2020-12-27 02:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c95592dd3d7588851ce81df77b5b32ab SHA-1: 327f826baeb6e987f5bd1f80e2251a5b2e956d08 SHA-256: 113fccfefda2d8ae30bc23dbbf7e15b971a2aa32efe050230f4093b11ed7b456
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffmen.ru/strik?utm_term=blossom+blast+saga+mod+apk+latest+version In PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/jenibokogu-pizejut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd2c76767e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fe7bee1725ce.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/KShkIjd/globe_at_home_prepaid_wifi_review.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/jjD9eAp/screen_timeout_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/rYieYnx/fitness_point_gym.pdfIn PDF document text
    • https://cdn.sqhk.co/xafileme/TEP4gi3/thermomix_frozen_banana_chocolate_ice_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/OjeSPhd/pobopodir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5fcf5aa33f2f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5f95bcf33a1f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nogedapuvul/jgiaDuy/46584559909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f8b60e7cf445.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/remeranexe/bidox.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/banjo_kazooie_bubblegloop_swamp_guide.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_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 5592 bytes
SHA-256: 139195045084e6071bd67967568290da3f86197eda20aa6713c000c46c472cd1
font_01_sfnt_off0000df27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF27 10368 bytes
SHA-256: 396d2087bc2f171db54dd867c36f77972347b8dee262bb0eff1c3ab36383f24b

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