Malicious PDF — malware analysis report

Static analysis result for SHA-256 595157e3136b3575…

MALICIOUS

PDF

86.8 KB Created: 2021-04-12 08:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 095ef71698e27a7a82e74ce01a16d3a2 SHA-1: 7699d6cd184407361495806cf47826e229742f6a SHA-256: 595157e3136b3575da45de23a306d681ff9559174dcb7447ce8a9aa5da858da6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to suspicious domains, likely serving as lures for users to click through.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=buy+bowflex+xtreme+2se+home+gym PDF link annotation
    • http://mutujejeturuduf.medianewsonline.com/cardiogenic_vs_noncardiogenic_pulmonary_edema.pdfIn PDF document text
    • https://ranaxeli.weebly.com/uploads/1/3/4/4/134478161/lerikajaxuviwerij.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/7891587.pdfIn PDF document text
    • http://shtampshop.ru/wojuduzarunagurelelordlgc7.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/7490150.pdfIn PDF document text
    • https://bolubevegu.weebly.com/uploads/1/3/1/4/131454373/5680980.pdfIn PDF document text
    • http://esagafow.fun/tovogiger7gqik.pdfIn PDF document text
    • http://rankingcoach-apps.com/what_is_a_sonic_route_44_drinkd8a27.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/2640349.pdfIn PDF document text
    • https://vunidiripoga.weebly.com/uploads/1/3/1/4/131453449/8597355.pdfIn PDF document text
    • http://umdtheatre.ru/refuzasakexonesedotumo0v8g.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/xibabinifotivona.pdfIn PDF document text
    • http://ch-redirect.icu/bebexegina2zubd.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/xarubeviwerix.pdfIn PDF document text
    • https://xevosafodom.weebly.com/uploads/1/3/4/7/134739965/zozugabixib_jajakur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_8428296b842b4e37874fc9db8e302dd6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c200f1f-c8a9-489a-9e3c-5856f60ad44a/55046129771.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_c301ab05c3584b669ece16c01b1d8809.pdf?index=trueIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_12c912b1c11c4b6fb6875e2942054f1e.pdf?index=trueIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/28562514193.pdfIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_259bd7fd76714eeea5692fc2a44c6dfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39bfa06-7c20-4b99-ae48-b5f27e2017c6/26276772204.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/autumn_leaves_partitura_guitarra_clasica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baddfa07-e72e-44e3-834d-9b1633a43f56/how_much_does_it_cost_to_replace_a_transmission_bearing.pdfIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_e97a513d2f7146189b621339f5cb483f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e511956f-faa6-4a80-8fcb-30338cf5edd1/58558811389.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_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 5280 bytes
SHA-256: f3059d6f12625c92fd6a59c826914368a2d84630d90c5e1e166fb6a64fd0858f
font_01_sfnt_off00011b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B51 10580 bytes
SHA-256: 9941d1ff4e5715226ce8fbb96c5d1fe2ac545bd9d5395c1763d899264d028c10
font_02_sfnt_off00013f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F55 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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